1、被要求
... on track走上正轨, 在正道上 think about考虑…; 捉摸… be required to被要求… ...
2、需要以
peeking isn't very nice you know » 查看并不是很好，你知道 be required to » 需要以 forcaster said the weather may be rainy hard » forcaster说的天气可能雨季硬 ..
3、要求
... In the event of ,万一，如果......发生（什么事） Be required to ,（被）要求 Gorilla costume ,扮成猩猩时穿的服装 ...
be required to do被要求做
be required to win必胜
Will be required to将必需用到
sb be required to do正在翻译;某人被要求做
be required to do sth被要求做某事
be required to -V被要求
To be urgently required急需
required to be watertight必须水密
to be required被要求