1·The two sides can be hard to tell apart.
双方可能很难分辨。
2·When you think how easy and cheap, relatively , it is to buy a bunch of carrots or beets , why raise them? And root crops especially are hard to tell apart, when store bought, from our own.
你想想买一堆胡萝卜和甜菜根回来是件多么容易而便宜的事情，何必自己种呢?根茎作物尤其难以分辨是自己种的还是买来的。
3·Male and female crocodilians can be hard to tell apart visually.
男性和女性鳄鱼可能很难分辨视觉。
1·A decade from now the players will be hard to tell apart, and there will probably be survivors from each group.
自此以后的十年玩家将更难以区分，将很可能从每一组别里都有幸存者。
2·From the beginning, the two were hard to tell apart.
从最开始，这两个学位便很难区分。
3·Even when magnified, the two organisms are difficult to tell apart.
即使放大之后，这两种有机体也难以区分。