1. be in flux 处于不断的变化之中
Like Tunisia, Egypt today is in flux, as a range of interest groups contend over the direction of the future.
和突尼斯一样，今天的埃及变化不定，各种利益团体都在争相把控未来的发展方向%21sIO*+GIPAXhIBZ6f。

2. walk on eggshells 小心翼翼地
I always felt as if I had to walk on eggshells around him so that I wouldn't hurt his feelings.
我感觉在他身边时我总是要小心翼翼的，以免惹他不高兴BS(WZNwNJK。

3. at the helm 掌控全局
The President is at the helm of the Ship of State.
总统是国家之舟的舵手l4=@d8w[X3(.X#k(!k。

4. at a tricky time 处境艰难
Chinese telecoms equipment maker Huawei is at a tricky time in America.
在美国，中国电信设备制造商华为当前的处境颇为艰难&E0!,8bL=_&c|Q。