Many forest tree species have multiple archegonia which, after fertilization produce a number of proembryos.许多林木树种都有颈卵器, 受精以后便产生许多原胚.She latched on to his arm, hooking her other arm around a tree.她拽住他的胳膊不放，另一只胳膊抱紧一棵树。The...
He sees himself going right to the top of the tree.他预见自己在同行中将无人可及。He was a huge man, built like an oak tree.他是个大块头，结实得像棵橡树。The driver failed to negotiate a bend and ran into a tree.司机没能顺利拐弯，撞到了树上。...