You will always have the bad as well as the good in the world.
人生在世总是有苦有甜。
He has carried out extensive research into renewable energy sources.
他已经对再生能源进行了广泛研究。
The first part of the plan has been safely accomplished.
计划的第一部分已顺利完成。
We had no say in the decision to sell the company.
在决定出售公司的问题上，我们没有发言权。