常見例句Positive lookahead and lookbehind do not backtrack. 積極的預(yù)測先行和追溯不回溯。The biggest limitation is that yacc is limited to one token of lookahead. 最大的局限在于,yacc被限定為一個預(yù)讀標(biāo)記。This “l(fā)ookahead” into cool/hot spot movement is supplied to you each turn. 這些對于冷/熱場的的移動信息在每次移動之前會提供給你。Provides information about regular expression lookahead and lookbehind behavior. 提供關(guān)于正則表達式預(yù)測先行和追溯行為的信息。Assertions do not change: lookahead looks to the right; lookbehind looks to the left. 斷言不改變:預(yù)測先行向右搜索;回顧后發(fā)向左搜索。Our eyes are placed in front because it's more important to lookahead than to look back. 我們的眼睛長在前面是因為向前看比向后看更重要.;如果你向后看 返回 lookahead