如何使用 "lesson" 造句

1. You must learn this lesson .
你必须吸取这个教训。
2. He had learned his lesson .
他汲取了他的教训。
3. This raises a broader lesson .
这可以析出更多的教训。
4. Microsoft has learned its lesson .
微软已从中吸取了教训。
5. Does this lesson need restating ?
有必要重申这一教训吗?