单词：mechanical cleaning off dust
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A: Did you clean your room today? B: No, not yet. A: Well, when were you planning on doing that? B: I'm going to clean it up later. A: Didn't I ask you to clean it up earlier? B: I'm going to clean it. A: I want you to vacuum in your room, and don't
英语情景对话-日常生活
A: Have you begun cleaning up that room of yours? B: I haven't started yet, but I will. A: What time are you going to clean it up? B: I'm planning on cleaning it up a little later. A: I told you to clean it up earlier. B: I know. I am still going to
英语情景对话-日常生活
A: Have you started cleaning up your room yet? B: I haven't gotten started on my room yet. A: When exactly do you plan on cleaning it? B: I have every intention of cleaning my room later. A: I thought I asked you to clean your room earlier. B: I alre
英语情景对话-日常生活
This is Scientific Americans 60-Second Science. I'm Cynthia Graber.This will just take a minute. Imagine giant fields filled with photovoltaic solar panels, soaking up rays. The best spots to put such panels are obviously sunny, with little rain. But
Scientific American(八)月
太阳能电池板能通过自发电脉冲震落其灰尘，以确保最大限度的获得光照。 Imagine giant fields filled with photovoltaic solar panels, soaking up rays. The best spots to put such panels are obviously sunny, with little rain.
60秒科学
A:Did you clean your room today? B:No, not yet. A: When were you planning on doing that? B: I'm going to clean it up later. A: Didn't I ask you to clean it up earlier? B: I'm going to clean it. A: I want you to vacuum in your room, and don't forget t
日常生活-Daily Life