Their participation is subject to a number of important provisos.

他们的参与受一些重要条款的限制。

《牛津词典》

Only in this way can the critical mass of participation be reached.

只有这样才能凑足参加人数。

《柯林斯英汉双解大词典》

A back injury prevented active participation in any sports for a while.

背伤曾一度妨碍积极参加任何体育运动。

《牛津词典》

For each ten percentage point increase in sports participation, she found a one point increase in female college attendance.

VOA: special.2010.03.04

And there's also an experimental participation requirement, and next week I'll hand out a piece of paper describing the requirement.

我还要求你们以被试的身份去参加实验,下个星期我会给你们,一份关于要求的介绍

耶鲁公开课 - 心理学导论课程节选

And I put on the sheet this year--I think I'm going to try to count five percent for class participation.

今年的课程,我想我将会把出勤率,按照占百分之五的学分计算

耶鲁公开课 - 聆听音乐课程节选

But the chances of Sunni participation have been complicated by a split in Sunni ranks.

NPR: Infighting Marks Sunni Political Efforts in Iraq

Participation in the opening milonga, like all of the festival's events, is free of charge.

BBC: World Tango Festival

Participation is limited to 20 to 25 people and you can sign up on the Facebook page.

BBC: Walk with the locals in Mumbai