相关题目
如果温度有可能降到-20摄氏度，拆下电瓶。
对插图进行修改时，可使用黑色的 竖线或小手来标识修订之处。
When the area is sufficiently cool, polish the surface.
When the smoke control relay R648 energizes, it supplies 28v dc to energize the supply system control interrupt relay R645.
When the pressure decreases, the indicator shows that there is a leak.
When the weather is very bad, keep these parts in a dry area.
When you do maintenance on the waste water system, do not touch your face with your gloves.
When you install the pitot head, make sure that the opening points forward.
When you push the FAULT/INOP test switch, faults are simulated to do a check of the circuit ability to detect a fault.
If you use more complicated types of sentence structure other than the imperative form, you can cause ambiguity.
