Ribo (nucleo)tide
[化] 核(糖核)苷酸
??? 情景例句
It's just one of those things.
這樣的事情總是難免的。
A friend in need is a friend indeed.
患難朋友才是真朋友。
It can take as long as eight days to rig up rope ladders and to establish supply bases before a descent can be made into a very deep cave.
有時需要花費整整8天時間來搭起繩梯，建立供應基地，然后才能到一個很深的洞穴里。