细胞的这种向里推进标志着原肠胚形成的开始.This pushing - in of cells marks the start of gastrulation.外胚层囊胚的外层,在原肠胚形成之后生后外胚层组织.The outer layer of a blastula that gives rise to the ectoderm after gastrulation....
Archie liked to think he kept up with current slang.阿奇喜欢那种紧跟潮流，讲满口时髦新词的感觉。Archie kept us amused with his stories.阿奇一直给我们讲故事来逗我们开心。Archie, shut up. You're prattling.阿奇，闭嘴！净废话。...
The castle was rebuilt by his great grandson in 1859.城堡在1859年由他的曾孙重建。The interiors were disembowelled and rebuilt.内部全拆后又重建了。Since then, the palace has often been added to, rebuilt and repaired.从那以后, 那座宫殿不断得到扩建和修缮....