1.up to 直到;多達
The sun's rays can penetrate water up to 10 feet.
太陽的光線可以穿透到10英尺深的水下
2.be based on 基于;以……為根據
We find her evidence to be based on a degree of oversensitivity.
我們認識到她提供的證據在一定程度上是出于過分敏感
3.equivalent to 相等的;等同于
One kilometre is equivalent to two li.
1公里為2華里