① chain意為“拴住”,尤指用鏈子把某人或某物拴住。
The dog is chained to a tree. 狗被拴在一棵樹(shù)上。
② fasten指“拴緊,使固定,將注意力集中于”。
He fastened his attention on a fire in the distance. 他凝視著遠(yuǎn)處的火光。
③ secure意為“使……安全,把……弄牢”,著重確保安全。
You can not secure yourself against all risks and dangers. 誰(shuí)也不能使自己不遭遇任何危險(xiǎn)。