1.worry about 担忧，烦恼

例句:Those comments suggest an oil-addicted global economy has little to worry about from this week's price spike.

这些言论表明，严重依赖于石油的全球经济不必因为上周的油价飙升而过分担忧。

2.begin to 开始

例句:They often find they begin to chat to relieve the boredom of the flight.

他们发现自己常常是为了打发飞行途中的无聊才开始聊天。

3.plan to 计划

例句:The military operation was the first step in a plan to crush the uprising.

军事行动是镇压暴动计划的第一步。

4.set up 建立
例句:I set up a ginger group on the environment.

我建立了一个积极从事环保的组织。