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- That is why red, orange and yellow flowers are very common in nature while black flowers are so rare. 这就是为什么红色、橘黄色和黄色花在自然界如此普遍,而黑色花如此稀少的原因。
- Why red?To figure out the purpose of the red pigment, Hoch and his coworkers bred mutant plants that can't make anthocyanins and compared them with plants that do make anthocyanins. 这项研究发现,花青素有点像是防晒油,当叶绿素变少的时候,叶子会变的很容易被太阳晒伤。
- She knows why the metal is the good conductor. 她知道金属为什么是好的导体。
- Must you dash off? Why not stay for a cup of tea? 你一定要急急忙忙走吗?为何不留下喝杯茶呢?
- Is that why you don't want to go home? 这就是你不想回家的原因吗?
- That explains why she is not here. 那就说明了她不在这里的原因。
- It seems uncertain why he lost the election. 他落选的原因似乎并不清楚。
- Do you know why Mr Brown has a heavy heart? 你知道为什么布朗先生心情不愉快吗?
- I do not know why acids eat in metals. 我不知道酸腐蚀金属的原因。
- I have no idea why he resigned his post. 我不知道他为何辞去他的职务。
- He expounded the reasons why he did it. 他阐述了他做这件事的理由。
- The reasons why he did it are obscure. 他做那事的理由还不清楚。
- I couldn't cipher out why she was there. 我搞不清她为什么会在那儿。
- I don't know why she is hostile to me. 我不知道她为什么对我抱有敌意。
- Why is it that we should be afraid of him? 我们为什么要怕他呢?
- Do you know why she is so strange to him? 你知道她为什么对他如此冷淡吗?
- I can't figure out why he quit his job. 我琢磨不透他为什么要辞掉工作。
- I can't understand why your plan fell through. 我不懂你的计划为什么竟会失败。
- I gather she's ill, and that's why she hasn't come. 我想她是病了,所以没有来。
- I want to know why Tom answers a letter for me. 我想知道为什么汤姆没有给我回信。