1.on the basis of 根据
Statement should be made on the basis of fact.
说话要有根据 。
2.on board 在船(火车、飞机)上
We went on board and saw these people packed shoulder to shoulder on the decks.
我们上了船,看见这些人在甲板上肩挨着肩挤在一起 。
3.deflect 阻止
The government will not be deflected from its commitments.
政府决不会因任何阻碍而放弃承诺 。
4.obscure 遮盖
We mustn't let these minor details obscure the main issue.
我们不能让枝节问题掩盖主要问题 。