And,finally,do not add diseased vegetable plants to the pile if the compost will be used on a vegetable garden.

VOA: special.2009.06.23

It used to be thought before people were very careful- we know that they do every terrible thing in the world in the Peloponnesian War.

人们谨慎行事之前曾考虑过,我们知道他们在伯罗奔尼撒战争中,做尽了世上的恶事

耶鲁公开课 - 古希腊历史简介课程节选

Sam used to be a river raft guy, a river rafting guide, so we would go do that.

萨姆以前是漂流队的指导员，所以我们可以玩那个。

与朋友们的回忆 - SpeakingMax英语口语达人