D. Abandoned unilateralism (The correct answer is a).

放弃单边主义(正确答案是A)。

Unilateralism is very difficult to have a market.

单边主义是很难有市场的。

I believe that unilateralism is too expensive and open dialogue is too slow.

我认为单边主义代价太高，公开对话效率太低。

Thirdly, the unilateralism pursuing of vocation lead to the imperfect humanities.

三是片面追求职业教育导致人文教育的缺失；

The mechanical capability in unilateralism compress of aluminum foams was studied.

研究了制备的泡沫铝在单向压缩下表现出的力学性能。