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PSD7151W with innovative structural design, is a suitable infrared outside the network security uniform ball and cover with the rotating movement, for the first time a multi-way to extend the life of bearings, infrared lights up and down together with the Yuntai the right and left rotation, make full use of light source, greatly enhance the user's viewing angle, no dead ends to facilitate monitoring and return to the default preset inspection points.

PSD7151W 以创新的结构设计，是一款适合于外安防的红外网络匀速球，球罩与机芯一起旋转，首次采用多轴承方式延长寿命，红外灯随云台一起上下、左右旋转，充分利用光源，大大提升使用者的可视角度，监控便利无死角，且可预设预置点来回巡视。

The hill led down with an uninviting cliff running along my right side.

向下的山路上，我右手边上就是悬崖，毫无美感可言。

Sara likes doing it up and down, and I like doing it left to right.

Sara 喜欢一上一下地干，而我却喜欢一左一右地干。

Sonya likes doing it up and down, and I like doing it left to right ...

当然，我们的中文更美，我们学好英语后，把我们最美的中文传遍全世界！

Sonya likes doing it up and down, and I like doing it left to right...real slowly.

而我喜欢左右做。。。要慢慢做。所以请留下你要说的话

Each time I received a letter from mum, I would always started to stroke the stamp on upper right corner of envelope because it had been sticked by mom by her bare hands. It was regularly sticked, but never beautifully done with upside-down picture because my mother was so blind that she sticked it all by feeling.

每回接到母亲来信，我都要抚摸贴在信封右上角的邮票，那是母亲亲手贴上去的，它贴得规正却无画面感，很多时候是头朝下的，因为母亲根本看不见，她是凭感觉在贴。

It's all right,' she said,'but isn't it upside down?

没关系，"她说，"但是它不是颠倒了吗？

"My life is completely turned upside-down, and yet it feels right. It's bizarre."

我的生活彻底改变了，而且那感觉非常美好，哈，真奇怪。

It's all right,' she said,'but isn't it upside-down?

她说："不错，不过，是不是挂倒啦？"

Maybe in another world, another time,my reflection is right side up, and I am upside-down

也许某个世界、某个时间，我和倒影颠倒了位置。

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。