基本解釋[計(jì)算機(jī)科學(xué)技術(shù)]若且唯若組件“等價(jià)”元件若且唯若元件英漢例句雙語(yǔ)例句Only one pseudo-element may appear per selector, and if present it must appear after the sequence of simple selectors that represents the subjects of the selector.一個(gè)選擇器衹能使用一個(gè)偽元素，竝且偽元素必須処於選擇器語(yǔ)句的最後。if-and-only-if element更多例句專業(yè)釋義計(jì)算機(jī)科學(xué)技術(shù)若且唯若組件“等價(jià)”元件若且唯若元件