A chain can only be as strong as its weakest link, so we must look at the least committed country to see if the alliance will hold.一条链子的强度取决于它最薄弱的环节。所以必须观察最不坚定的成员国来确定联盟是否牢固。There was no great conviction in his voice.他的声音显示出他的信念并不坚定。His performance was woefully short of conviction.很遗憾，他表现得一点儿都不坚定。