The frail craft rocked as he clambered in.他爬进来的时候，那件易碎的工艺品摇晃起来。Mother was becoming too frail to live alone.母亲已逐渐衰弱到无法独居。The boy was frail and never ganged with his fellows at school.这个男孩身体虚弱,从不和同学们一起玩....
Nothing can undermine their fast friendship.没有什么能破坏他们忠实的友谊。Rivers undermine their banks.河水冲刷堤基.These incidents could seriously undermine support for the police.这些事件会严重影响对警方的支持。I don't want to do something that would...