1懦弱的英语:cowardly, fainthearted, milk-livered, poor-spirited, sheepish, spineless, weak, weakling, white-livered
2软弱的英语:weak, feeble, flabby, flaccid, lank, limp, feckless, weak-kneed
3脆弱的英语:flimsy, frail, vulnerable, tender, brittle, washy, weak
