Admittedly, it is rather expensive but you don't need to use much.

　　它的確很貴，但不需要用得很多。

　　Sometimes, avoidance of one particular food will have this beneficial effect, though admittedly rarely.

　　有時(shí)，對某一食物的忌口能帶來這種好處，盡管不可否認(rèn)這種情況極為少見。

　　The subject of racism is admittedly too complex for facile summarization.

　　無可否認(rèn)，種族主義這個(gè)話題太過復(fù)雜，不可能一言蔽之。

　　Admittedly we can make the journey by train, but there is no harm in our travelling by boat.

　　乘車固可，乘船亦無不可。

　　What these unintended consequences might be is admittedly far from clear.

　　無可否認(rèn)的是，沒有人知道這些可能的意外后果是什么。