2. process n. 过程, 进程
例句：The bridge is in the process of being built.
大桥正在建设中。
3. lack vt.缺乏; 缺少
例句：They met with many difficulties, for they lacked equipment, experience and technical data.
因为缺少设备, 缺乏经验和技术资料, 他们遇到不少困难。
4. dense adj. 密集的,稠密的
例句：We fought our way through dense forest.
我们奋力通过密林。
5. prominent adj. 显著的; 突出的
例句：A single tree in a field is prominent.
田野中独立的一棵树是极为明显的。
6. constrain vt.强迫, 强使; 限制, 约束
例句：Cold weather constrained the plant's growth.
寒冷的天气抑制了植物的生长。
7. threaten vt. 威胁，恐吓，恫吓；危及，对…构成威胁
例句：It will greatly threaten the peace in the Middle East.
它将会极大地危及中东和平。
8. aspect n.方面
例句：The training program covers every aspect of the job.
训练计划的范围包括了这种工作的各个方面。
9. vow v. 起誓, 发誓；郑重宣告
例句：I vowed to do more of the cooking myself.
我发誓自己要多动手做饭。
10. awareness n. 察觉;觉悟;意识
例句：Environmental awareness has increased over the years.
这些年来人们的环境意识增强了。
