本实验主要观察关节盘的前带(anterior band,AB)下面和后带(posterior band,PB)被覆的滑膜组织(图1)。染色结果判断标准[1]如下。
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尽管她系了安全带,还是被猛然前抛。
Despite the fact that she was wearing a seat belt, she was thrown sharply forward.
某天飞机起飞前,空姐走到山姆面前要求他系好安全带。
One day before the plane took off, the stewardess approached Sam and asked him to fasten his seat belt.
来自公元前3000年左右的一块苏美尔的雕刻陶土板提供了已知最早的例证:一个带顶棚的箱状雪橇被安装在四个实心的轮子上。
A tablet engraved about 3000 B.C.E. provides the earliest known example from Sumer, a roofed boxlike sledge mounted on four solid wheels.
Now, the amazing thing is, if you go to Mexico you can go to museums that have children's toys from pre-Columbian Mexico with wheels.
现在神奇的事情是,如果你去墨西哥,你可以去博物馆,那里有前哥伦比亚墨西哥时代的,带着轮子的幼儿玩具。
The subprime mortgage market was bringing people into the mortgage market who in prior decades would not have been involved-- would not have had any mortgage.
次贷抵押信贷市场,把十多年前那些,不能获得抵押贷款的人,带进了抵押信贷市场
And so the first three chapters take you through the history of chemistry starting with Democritus.
前三章将带你们回顾,化学的历史,由Democritus开始。
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