He'll enter for an event.

他要参加一项比赛。

youdao

Handle the Enter key: Instead of having an Add button, watch for users pressing the Enter or Return key by hooking onto the onkeydown event in the textarea.

处理enter键：取消Add按钮，通过检查textarea的onkeydown事件看看用户是否按下了Enter或return键。

youdao

However, when you enter the water for an open water event, you need to be prepared for all sorts of different conditions.

然而，当你参加一场公开水域赛事的时候，你需要准备好面对各种不同的环境。

youdao