The anarchic nature of the international system forces states to compete for power.
我从未真正想过要成为一名导演。我只是想拍好电影。
We wish to discuss a structure for salt of deoxyribose nucleic acid. This structure has novel features which are of considerable biological interest.
建筑始于你小心翼翼地将两块砖垒在一起的那一刻。