1. Public attitudes to the strike have hardened. 公众对这次罢工所持的态度已强硬起来。
2. The incident hardened her resolve to leave the company. 这件事使她更加坚定了离开公司的决心。
3. As the centuries passed, the rock cooled and hardened, shrinking and cracking into long columns. 几个世纪过去了，岩石冷却、硬化，随后收缩、开裂，变成了长长的石柱。
4. At least, until the snow hardened into ice, the whiteness turned to sludge, and everyone started to moan again. 至少，在积雪硬化成冰，白雪转成污泥之前，人们又开始抱怨。
5. A few hundred degrees separates this pool of fiery orange magma in Italy's Mount Etna from its hardened, gray crust. 在意大利的埃特纳火山，几百度的高温将这一池炽热的橙色岩浆与坚硬的灰色地壳分开。
