单词:cross section for nuclear fission
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Surprising Origin of 'To Keep at Bay' Now, it's time for Words and Their Stories from VOA Learning English. On this program, we explore everyday expressions that we use in conversation. Americans often use the first saying we will talk about today. B
[00:00.00]Unit 9 The memory robot [00:34.51]A:Did you pack your bags last night,dear? [00:40.25]B:Yes,I did.I packed everything. [00:45.11]R:No,you didn't.You didn't pack your computer. [00:52.48]A:Did you pack your coat,dear? [00:57.03]B:I...um,...I
What do you do when you have time to kill? It's a bit of a violent phrase, isn't it? It really means to use up spare time, or extra time. That is just(1) what I was doing this weekend, while I was waiting for my son's basketball game to start. We had
5 Reasons to Try Firefox Quantum Browser Mozilla has released a new update of its Firefox browser that it says is much faster and provides a better overall user experience. But can the new version called Firefox Quantum compete with the worlds curren
Johannesburg Leads Africa in Twitter Usage 推特使用方面南非冠绝非洲 From VOA Learning English, this is the Tech Report. 这里是美国之音慢速英语科技报道。 Johannesburg is tweeting up a storm. The South African city leads the
Dictionaries range broadly in purpose, size, and price; and choosing one is a very personal decision. The best advice is to make note of the things you and your family look up in a dictionary over a few weeks' time, and then go to a comprehensive boo