Between thirty and thirty-five women used each system to pump water from the ground or a stream.

VOA: special.2010.01.11

A patterned series of these tiny charged berries on the disk represents a single bit of data in the binary number system used by computers.

这些在磁盘上的有序的小粒子,代表这个当代计算机中,二进制中单独的一位。

哈佛公开课 - 计算机科学课程节选

This is commonly used in the immune system as well, but it's a way of amplifying a signal.

免疫系统也常使用这种方法,但这主要是一种放大信号的方式

耶鲁公开课 - 生物医学工程探索课程节选

Google agreed to create a system to pay copyright holders when their works are used online.

VOA: special.2011.04.01

Air traffic used to be everything flew to places local to it but now there's a system of hubs, Chicago O'Hare for instance or Newark where planes fly through.

以前的飞机都是飞往它的所属地,但现在的航空运输是一个由交通枢纽组成的系统，例如飞机会途经芝加哥O'Hare机场或Newark机场。

耶鲁公开课 - 心理学导论课程节选

The A.F.L.also opposed extremists who used labor protests to change the social system.

VOA: special.2010.05.06

This is a mode of communication that's used very frequently in the immune system as we'll see later.

这种通讯方式,在免疫系统中广泛使用,我们下面会讲

耶鲁公开课 - 生物医学工程探索课程节选

The current system has been used since two thousand five.

VOA: special.2009.05.06

The immune system that we're used to thinking about is called the adaptive immune system, and the adaptive immune system does just that.

我们过去认识的免疫系统部分,现在被称为获得性免疫系统,获得性免疫系统功能如下

耶鲁公开课 - 生物医学工程探索课程节选

His system still is used today.

VOA: special.2009.04.29

Well, the endocrine system is a body organ system that is specialized in producing these kinds of signals that are used - that accumulate in the blood and are used by cells all over the body.

内分泌系统是一种,作用于周身各器官的系统,它专门产生这些有用的信号,这些信号在血液中聚集,全身各处的细胞都可利用

耶鲁公开课 - 生物医学工程探索课程节选

Or you get a cold, the cold virus takes hold, the viruses start replicating inside of you and it takes some time for immune system to gear up to eliminate it, so we're used to thinking about responses that take some time.

或者你得了感冒,感冒病毒扎根在你的身体中,病毒开始在你体内复制,免疫系统需要一定时间做好准备去消灭它,所以我们曾认为免疫反应需要一定时间

耶鲁公开课 - 生物医学工程探索课程节选