我寄宿家庭里的姐姐是一个非常用功的学生。

My host sister is a really hardworking student.

youdao

凯去了澳大利亚工作。我上大学时和她姐姐同住一个房间。

Kae, whose sister I shared a room with when we were at college, has gone to work in Australia.

youdao

我姐姐刚好有一个，她不能去，因为她的日程安排有点冲突。

My sister just happened to have one and she can't go since she has got some sort of conflict in her schedule.

youdao

Because her brothers have naturally done what any brother would do accompanying a sister in a dangerous forest at night.

因为她的弟弟,做了任何一个弟弟深夜跟随着姐姐,在一个危险森林会做的事。

耶鲁公开课 - 弥尔顿课程节选