基本解釋[計算機(jī)科學(xué)技術(shù)]若且唯若組件“等價”元件若且唯若元件英漢例句雙語例句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.一個選擇器衹能使用一個偽元素，竝且偽元素必須処於選擇器語句的最後。if-and-only-if element更多例句專業(yè)釋義計算機(jī)科學(xué)技術(shù)若且唯若組件“等價”元件若且唯若元件