It works by sending a series of electrical impulses which are picked up by hi-tech sensors.
它通过传输由高技术传感器收集的电脉冲而起作用。
Once you have started the boulder rolling, it develops momentum, which is defined by its mass and velocity.
一旦你开始让巨石滚动，巨石就会产生动量，这是由其质量和速度决定的。
It was a huge milestone in the development of smartphones, which are now owned by a majority of American adults and are increasingly common across the globe.
这是智能手机发展中的巨大里程碑，如今大多数美国成年人都拥有智能手机，这种情况在全球范围内也变得越来越普遍。
The snag is that unprofitable companies, which should have been squeezed out by competition, have remained alive because it is so hard to fire workers.
问题在于，那些本应被竞争挤出市场的无利可图的公司，却因为裁员如此之难而存活了下来。
Meanwhile, its place is taken by hotter intergalactic gas from farther out on the edge of the galaxy, which cools as it is compressed and flows into the galaxy.
与此同时，它的位置被更热的星系间气体所取代，这些气体来自更远的星系边缘，在被压缩的过程中冷却并流入星系。
There is a price to be paid in that it is a delicate crop that cannot be lifted by machine or it will be bruised and rot, so has to be hauled by hand which is expensive.
这是要付出代价的，因为这是一种脆弱的农作物，不能用机器采摘，否则就会被压伤和腐坏，所以必须采用手工拖运，这是非常耗钱的。
The sentence defines normative ethics by specifying the sense of the "norms" for which it searches.
这个句子通过指定它所寻找的“规范”的意义来定义规范性伦理。
It is required by law to shut down banks which it regards as chronically short of capital.
法律规定要关闭资金长期短缺的银行。
It is universally acknowledged that by reading the abstracts, you can determine which articles are worth reading in full.
普遍认为，通过阅读大纲，你可以确定哪些文章值得充分阅读。
The hoplite has two weapons, of which the most important by far is a pike, I guess, is what we would call it.
重装步兵有两种武器，其中最重要的是长矛，我猜，我们一般都这么称呼它的。
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