分为四个不同的类群: 苏铁类 、 银杏类 、 松柏类、买麻藤类植物以及一些化石类群. There are four widely different living groups: the cycads , ginkgo, conifers , gnetophytes, and several fossil groups.
If come menstruation and is electronegative is the specification pregnant certainly?如果来月经而且试纸是阴性是不是说明一定没怀孕?This paper investigated the process of avalanche growth in electronegative gas.提出了一种分析电负性气体中电子崩发展过程的四参数模型.Put lea...
Halley's Comet is going to come back in 2061.哈雷彗星将于2061年回归。The value of the Halley family's stake has fallen by half since 1999.从1999年以来,Halley家族的股份缩水了一半.Earth crosses the orbit of Halley's Comet annually ...
有人举报说他们正在从满满当当的卡车上卸洗劫来的家具。They were reported to be unloading trucks filled with looted furniture.虐待儿童案件常常没人举报，或者为缺乏相关知识的公民所忽略。Cases of child abuse often go unreported or ignored by uninformed citizens.向警方举报某人将获重赏。There w...
在所有简单无害的娱乐项目背后都隐藏着危险，特别是对儿童而言。Under all the innocent fun, there are hidden dangers, especially for children.我们问了娱乐圈里的女性有关电影制作的内幕。We asked women in the biz for their low-down on film-making.“娱乐消遣是每个国民都能享受的事，”她坚定地说。"Enter-...