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。...
二百五十多年前的惠更斯目镜今天还在广泛使用.The Huygens ocular , which dates back over 250 years is still in wide use today.此时场镜上的划痕和小点会在接目镜中看见.Then the scratches and spots on the field lens would be visible at the eye lens.在这两种仪器中, 物镜所成的象都是通...
The rescuers were beaten back by strong winds and currents.救援人员因风浪太大而被迫中断工作。In a warm-up game for the World Cup, Uruguay have beaten England.在世界杯热身赛中，乌拉圭队打败了英格兰队。They would look out through the cracks of their weather-be...
他双手拢在嘴边，大声呼喊黛安娜。He cupped his hands around his mouth and called out for Diane.他冲进一幢房子呼喊求救。He forced his way into a house shouting for help.路过的人听到了他求救的呼喊。Passers-by heard his cries for help....
这些系谱的掺入是更为离奇和无理的.The insertion of these genealogies is the more peculiar and unreasonable.依照我们的学说, 体型的一致是由于祖先系谱的一致.On our theory, unity of type is explained by unity of descent.系谱的分析表明了它有可能 X 相关特征遗传的.Analysis of pedigree...