单词：nonpositives
【数学】非正的；(整数)负的；(函数)负值的
单词：nonpositives 相关文章
Frog census volunteers misinterpreted recorded frog sounds in the field, leading researchers to suspect that frog populations may be even lower than thought. Declining frog populations are considered an indicator of environmental damage. But new rese
60秒科学
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute Declining frog populations are considered an indicator of environmental damage. But new research finds that frogs might be doing even worse than we thou
Scientific American(八)月
Larry和李华一起坐地铁回家。今天我们要学两个常用语：get the ball rolling和mull it over. LH: Larry, 这两天天气真好，我看，过不了多久树就要发芽了。我真巴不得春天马上就到。 LL: Me too. I can't wa
美国之音《流行美语》
Grammar Girl here. Todays topic is appositives. Guest-writer Bonnie Trenga writes, Today we have to decide if information is essential or extra, because if its extra well need some extra commas. The concept Im referring to is called an appositive. A
英语语法 Grammar Girl