Tetraoxypyrimidine
四氧嘧啶
??? 情景例句
Thank you. I appreciate your help.
謝謝！很感謝你的幫助。
A woman's work is never at an end.
婦女的活計做不完。
On motorways you can, at least, travel fairly safely at high speeds,
在公路上還好，你至少能以相當(dāng)快的速度安全地向前行。