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At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientious application, as if even the lines were French. On the roof of the schoolhouse, pigeons cooed in low tones, and I said to myself as I listened to them:"I wonder if they are going to compel them to sing in German too!" http://zw.go121.cn

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：&他们该不会强迫这些鸽子用德语唱歌吧？&

At one time some cock-chafers flew in;but no one paid any attention to them, not even the little fellows who werestruggling with their straight lines, with a will and conscientious application,as if even the lines were French. On the roof of the schoolhouse, pigeons cooedin low tones, and I said to myself as I listened to them:"I wonder if they are going to compel them to sing in German too!"

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：&他们该不会强圃烩些鸽子用德语唱歌吧？&

At one time some cock-chafers flew i but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and co cientious a lication, as if even the lines were French. On the roof of the schoolhouse, pigeo cooed in low tones, and I said to myself as I listened to them:I wonder if they are going to compel them to sing in German too!

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：他们该不会强迫这些鸽子用德语唱歌吧？

At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientiousapplication, as if even the lines were French. On the roof of the schoolhouse, pigeons cooed in low tones, and I said to myself as I listened to them:"I wonder if they are going to compel them to sing in German too!"

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：&他们该不会强迫这些鸽子用德语唱歌吧？&

At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientious application, as if even the lines were French. On the roof of the schoolhouse, pigeons cooed in low tones, and I said to myself as I listened to them:FH"I wonder if they are going to compel them to sing in German too!"

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：&他们该不会强迫这些鸽子用德语唱歌吧？&

At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientious application, as if even the lines were French. On the roof of the schoolhouse, pigeons cooed in low tones, and I said to myself as I listened to them:"I wonder if they are going to compel them to sing in German too!"

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年纪最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边沉思：&他们该不会逼迫这些鸽子用德语唱歌吧？&

At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientious application, as if even the lines were french. on the roof of the schoolhouse, pigeons cooed in low tones, and i said to myself as i listened to them:ng in german too!

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：&他们该不会强迫这些鸽子用德语唱歌吧？&

At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientious application, as if even the lines were French. On the roof of the schoolhouse, pigeons cooed in low tones, and I said to myself as I listened to them:I wonder if they are going to compel them to sing in German too!

有一回，几只金龟子跑进了教室，但是哪位也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：他们该不会强迫这些鸽子用德语唱歌吧？

Any attention to them, not even the little fellows who were struggling withtheir straight lines, with a will and conscientious application, as if even thelines were French. On the roof of the schoolhouse, pigeons cooed in lowtones, and I said to myself as I listened to them:"I wonder if theyare going to compel them to sing in German too!"

有一回，几只金龟子跑进了教室，但是谁也不去注意它们，连年龄最小的也不例外，他们正专心致志地练直杠笔划，仿佛这些笔划也是法语……学校的屋顶上，鸽子低声地咕咕地叫着，我一边听，一边寻思：&他们该不会强迫这些鸽子用德语唱歌吧？&

At one time some cock-chafers flew in; but no one paid any attention to them, not even the little fellows who were struggling with their straight lines, with a will and conscientious application, as if even the lines were French. On the roof of the schoolhouse, pigeons cooed in low tones, and I said to myself as I listened to them:"I wonder if they are going to compel them to sing in German too!"

有一回，几只金龟子跑进了讲堂，但是谁也不去留神它们，比春秋最小的也不例外，他们正潜心致志地练直杠笔划，仿佛这些笔划也是法语……黉舍的屋顶上，鸽子低声地咕咕地叫着，我一壁听，一壁深思：&他们该不会逼迫这些鸽子用德语唱歌吧？&

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。