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

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

　　無(wú)可否認(rèn)，種族主義這個(gè)話題太過(guò)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(chē)固可，乘船亦無(wú)不可。

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

　　無(wú)可否認(rèn)的是，沒(méi)有人知道這些可能的意外后果是什么。