third person singular present of be, Old English is, from Germanic stem *es- (cognates: Old High German, German, Gothic ist, Old Norse es, er), from PIE *es-ti- (cognates: Sanskrit asti, Greek esti, Latin est, Lithuanian esti, Old Church Slavonic jesti), from PIE root *es- "to be." Old English lost the final -t-. See be. Until 1500s, pronounced to rhyme with kiss. Phrase it is what it is, indicating resigned acceptance of an unpleasant but inevitable situation or circumstance about which nothing positive really can be said, is attested by 2001.
实用例句
1. In conversational English " is not " often contracts to " isn't ".
口头英语中is not 常缩写为 isn ‘ t.
来自《简明英汉词典》
2. There is ( but ) little hope.
没有什么希望. ( 比较:There is alittlehope. 还有一点希望.)
来自《现代英汉综合大词典》
3. Beauty is an attitude. It has nothing to do with age.
美是一种态度，与年龄无关。
来自金山词霸
4. The best thing to do when entering unknown territory is smile.
踏入未知地带最好的对策就是微笑。
来自美剧《凯莉日记》
5. A miracle is something that seems impossible but happens anyway.