When an elephant gets a whiff of something interesting, it sniffs the air with its trunk raised up like a submarineperiscope.
大象闻到一些感兴趣的味道，它就闻着那个味道翘起鼻子就像潜艇望远镜。
2
To compensate, they plan to install a submarineperiscope at the top of the vertical steel ladder leading to the original access hatch.
作为补偿，他们打算在竖直的钢梯顶部安置一个潜水艇的潜望镜，这个钢梯是通往原先过道出口的。
3
The paper introduces the configuration of system and the work principle of the closed and opened loop control in the pitching of collimation prism of the submarineperiscope.