Cancellation law
[計] 消去律, 相消律
?? 詞語組成解析
cancellation
[k?ns?'lei??n]
n. 取消;<數>（相）約;被取消的事物;作廢;
law
[l?:]
n. 法;法學;規律;法制;
vt.& vi. [口語、方言]訴諸法律，對…起訴，控告;
vt. 控告;對…起訴;
??? 情景例句
What now?
下一步呢？
He came at a bad time.
他來的不是時候。
There he was picked up by a policeman and sent back to England by the local authorities.
他在那兒被一個警察抓住了，之后被當局送回了英國。