单词:pyroelectric optical sensor
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2015年12月英语四级作文范文:坚持就是胜利 参考范文: There is an old saying: where there is a will, there is a way. It tells us that a strong will is the most essential quality that anyone who wants to achieve success. It can contr
It's the best day of the school-week and you're about to get a front-row seat to world headlines without a single commercial. In other words, CNN Student News. I'm Carl Azuz! The giant American flag was recovered in the aftermath of the September 11t
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Hi, everybody. This Father's Day weekend, I'd like to spend a couple minutes talking about what's sometimes my hardest, but always my most rewarding job being a dad. I grew up without my father around. He left when I was two years old, and even thoug
Polls will open in less than 24 hours for Lebanon's parliamentary elections, and civil servants are preparing polling stations and ballot boxes for Sunday's crucial vote. International election monitors, including former president Jimmy Carter, will