1·We had never expected to make such a careless mistake in the project.
工程中出现这样的纰漏是万万没有想到的。
2·In incurs in the process which bids, is easy the question which produces is in the execution careless mistake.
在招投标的过程中，容易产生的问题是执行中的纰漏。
1·A careless mistake cost the company millions of dollars.
一次疏忽造成了公司数百万美元的损失。