Although negotiators are optimistic, the details are complex enough that they may be hard-pressed to get a deal at all.

然谈判代表持乐观态度，但协议细节如此复杂，他们所面临的困难很可能使他们无法取得一致。

until bit by bit the walls of the ego recede,

直到自我的围墙一点一点地倒塌下来，

and yet one might be cautious about believing this statement.

不过，人们不会轻信她的抱怨。

and shows no signs at present of ceasing to rise.

并且目前尚无停止上升的迹象，

But, in contrast, it is only in modern times that Galileo has become a problem child for historians of science.

但是相比之下，只是在现代对于科学史家来说，伽利略才变成一个新的难题。

it is not always safe by the time it reaches the tap.

等水到达龙头时就不一定总是安全的了。