Experts say it could be the world's largest free-standing arch.

VOA: special.2009.04.15

I am especially concerned about attendence, So if you have arch-practice these Tuesday afternoons and can't be here every week, you shouldn't take this course.

我很在意考勤，所以，如果周二下午,你有实践活动课,不能每周都出勤的话，建议你不要选这门课。

麻省理工公开课 - 电影哲学课程节选

That is a maximum If you are sharing your time and energy during this period on Tuesday afternoons, or the arch-field don't work so think carefully about that.

让大家充分发挥自己的能力,如果每周二下午这段时间,你都有时间，精力也很充沛，就可以来上这门课，不过这样你就没时间参加实践活动了,所以请仔细考虑吧。

麻省理工公开课 - 电影哲学课程节选

Earlier this year, Tehran's arch-enemy Israel test fired its own Arrow 2 missile in a simulation of stopping the Shahab-3.

VOA: standard.2009.09.28

But in his conciliatory mood Saturday, Mr.Ravalomanana suggested he would not object to a constitutional change that would allow his arch-rival to seek the presidency.

VOA: standard.2009.11.08