pit sinking
常见例句
- This text introduced the practice method of the box permanent steel petroleum derrick shaft sinking in the construction of vertical shaft pit shaft.
在立井井筒建设中，我们在原设计的基础上，对箱形永久钢井架凿井的实际方法作了改进。 - Your stomach sinks, you have that sinking feeling in the pit of your stomach, when you get a bad grade on a test.
当你考试考砸的时候,你的胃会垂下去,或者说,会有胃部下垂的感觉 - Your stomach sinks, you have that sinking feeling in the pit of your stomach, when you get a bad grade on a test.
当你考试考砸的时候,你的胃会垂下去,或者说,会有胃部下垂的感觉
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