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。

youdao

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。

youdao

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。

youdao

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。

youdao