韵头yùn tóu
head vowel; any of the three vowels i; u and ü in certain compound vowels
原声例句
陪你入睡
Yeah, if you have shallow water with M-U-C-K on the bottom, that's a different story.
是的，如果你有浅水，底部有 M-U-C-K，那就是另一回事了。
Osmosis-遗传
RNA is complimentary to DNA though, so if an RNA strand has a nucleotide sequence 3' - A A G U C C A G U - 5', then the complimentary DNA or cDNA would be 5' - T T C A G G T C A - 3'.
但RNA与DNA之间互补，所以如果一条RNA链拥有如下核苷酸序列：3' - A A G U C C A G U - 5'，那么与之互补的DNA便是5' - T T C A G G T C A - 3'。