了解的英文：
understand
come to understand
find out

参考例句：

Be ill informed about;be ignorant about
很不了解

My roommate knows me well.
我的室友很了解我。

Knowledge of automobile industry quality management system
了解汽车行业质量要求

Make oneself understood; make oneself clear
使自己的话(心意)被了解

See into; look into;see through
查看;调查;了解;看穿

To take in a doctrine
了解一种主义

Keeping abreast of the latest developments.
及时了解最新动态

Get across
解释清楚,使人了解

We were ill informed about the changes.
我们很不了解这些改变。

Are you familiar with their correlation ?
你了解他们的相互关系吗?

understand是什么意思：
v. 懂，理解；了解，认识到；体谅

If you were older you might understand.
假如你年龄再大一点，你就会理解了。

I understand that skepticism.
我明白这一怀疑论。

You have to understand how cells interact.
你必须明白细胞是怎样相互作用的。

come是什么意思：
v. 来；发生；开始；出现；变成；达到；来做；来取；来拿
int. 嗨，得啦，好啦

The bale will be coming.
不幸就要降临了。

Come on get with it!
好啦，时髦点儿吧！

Illness comes in by mouth and comes out by it
病从口入祸从口出

find是什么意思：
v. 发现，认识到；找到，获得；遇见；找出；觉得；感受到；判决，判定
n. 发现；发现物；被发现的人

This is a monumental find.
这是一个巨大的发现。

He finds pleasure in reading.
他从阅读中得到乐趣。

The judge find for the defendant
法官裁决对被告有利