Fortunately I have one more key.
还好我还有一把钥匙。
Fish as laboratory animals play a more and more key role in modern life science.
鱼类实验动物在现代生命科学研究中扮演着越来越重要的角色。
If not, read it again slowly, and underline more key points.
如果不是的话，再慢读一遍，划出更多的重点。
If not, read it again slowly, and underline more key points.
如果不是的话，再慢读一遍，划出更多的重点。
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