Determining the functions of play is difficult because the functions may be long-term, with beneficial effects not showing up until the animal's adulthood.

定义玩耍的功能是困难的，因为这些功能可能是长期性的，其积极影响要到动物成年后才会显现。

youdao

Black children and white children could not play together—something Allen periodically brings up as "the stupidest thing I have ever heard".

黑人孩子和白人孩子不能在一起玩耍——艾伦时不时地提到这是“我听到的最愚蠢的事情”。

youdao

Now the media can acknowledge the impact, but are not to play it up.

现在媒体可以坦承受到冲击，但是并不过分强调。

youdao

Now we're going to play just a little bit of pop music-- Not too laud cause this really hipped up.

现在我们将放一段流行音乐,不要放得太响

耶鲁公开课 - 聆听音乐课程节选

For a player to score 38 goals when he does not even play up front is just amazing.

BBC: Micah Richards column

My problem with this argument is that stocks may not play catch up, but property prices could fall instead.

FORBES: Following The Smart Money In Asia

"The key is to get points early and not play catch-up, " Holland told BBC Sport.

BBC: SPORT | Football | My Club | Charlton Athletic | Holland targets Addicks revival