长时间

Ait a heck of a long time.

我们可等了很长时间。

Leave alfalfa for 3 or more years.

紫花苜蓿保留3年或更长时间。

The happiness of making several logs into a nice bench all by oneself is no less than that received by a writer from writing a book.

作家是脑力劳动者了吧，可是也需要去打字，也需要长时间伏案的体力劳动。

Ensure that safety, is helped you to allocate location easy to assemble by professional staff without fail,All-up weight that the wall puts up so that whose dynamics be able to prop up liquid crystal TV and book hanging for a long time.

有没有英文高手帮忙翻译一段专业性较强的文字？谢谢，下面这一段：保证安全，务必由专业人员协助您指定好安装位置，以使其力度能够长时间支撑液晶电视和本本壁挂墙架的总重量。

Prolonged exposure to an allergen with minimal symptoms.

最低限度的长时间的暴露在过敏物里

But the positive electrons produced by aluminium under the action of a source of alpha rays continue to be emitted for some time after removal of the source. The number of electrons emitted decreases by half in three minutes.

但是，在射线动能源作用下铝产生的正电子在动能源撤走后的相当长时间里仍继续被排斥出来，且排出的电子数量在3分钟后减少一半。

The silence went on a long time, and then a man called Krogh, an Alsatian, said,"Well, do we hxdye to volunteer?"

牢房里很长时间没人说话。后来一个叫克拉夫的阿尔萨斯人开口道："好了，我们有人自愿吗？"

He also knows how to cut deals in both Hong Kong's financial circles and Beijing's halls of power from his long tenure as a lawyer overseeing Shearman amp; Sterling's China practice before taking the ambassadorship.

他也知道怎样在香港的金融圈与北京的政治圈里做生意；在担任驻华大使之前，他曾长时间在Shearman amp； Sterling律师事务所执掌中国业务。

The essence of my mind in three dimensions, graphically depicted by the amphitheatre. It took a long time to arrive at that picture. But it was worth waiting for.

我的脑海中在想象着这样一幅三维画面，构建着这样一个圆形剧场，这让我花了很长时间，不过，它值得我如此地期待。

Wow that was mint. No wonder it took so long to prepare. What an opening ceremony.

哇，太棒了，怪不得花这么长时间准备，多么棒的开幕式啊。

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。