1.up to 直到;多达
The sun's rays can penetrate water up to 10 feet.
太阳的光线可以穿透到10英尺深的水下
2.be based on 基于;以……为根据
We find her evidence to be based on a degree of oversensitivity.
我们认识到她提供的证据在一定程度上是出于过分敏感
3.equivalent to 相等的;等同于
One kilometre is equivalent to two li.
1公里为2华里