Admittedly, it is rather expensive but you don't need to use much.
它的确很贵，但不需要用得很多。
Sometimes, avoidance of one particular food will have this beneficial effect, though admittedly rarely.
有时，对某一食物的忌口能带来这种好处，尽管不可否认这种情况极为少见。
The subject of racism is admittedly too complex for facile summarization.
无可否认，种族主义这个话题太过复杂，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.
乘车固可，乘船亦无不可。
What these unintended consequences might be is admittedly far from clear.
无可否认的是，没有人知道这些可能的意外后果是什么。