Drilling techniques that work well in one place can fail in another.
钻探技术可能在一个地方有用，在另一个地方就会失去作用。
If you fail in one thing, you take the other thing as a place, nothing can change you.
如果你在一件事上失败了，你就拿另一件事当寄托，没有任何事情能改变你。
Should you fail to come, ask Mrs. Chen to work in your place.
万一你来不了，就叫陈夫人代替你。
If you should fail to come, ask Mrs Chen to work in your place.
万一你来不了，就叫陈夫人代替你。
If you should fail to come, ask Mrs Chen to work in your place.
万一你来不了，就叫陈夫人代替你。
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