Submonoid
子半群
??? 情景例句
Don't mention it.
別提了。
A bit in the morning is better than nothing all day.
略有勝于全無(wú)。
A detective recently watched a well-dressed woman who always went into a large store on Monday mornings.
一名偵探最近注意上了一位穿著講究的婦女，她總是在星期一上午進(jìn)入一家大商場(chǎng)。