CNN News:俄前间谍中毒引爆英俄外交风波 英国宣布驱逐俄罗斯外交官

1. be exposed to 使暴露于（险境）；使遭受（危险或不快）；
例句：We are exposed to an overwhelming number of chemical contaminants every day in our air, water and food.
我们每天都会通过空气、水和食品接触到数量惊人的化学污染物。
2. as of 在…时；从…起；自…始；
例句：As of this writing, no reply has been received.
到写这封信时为止，尚未得到答复。
3. be responsible for 负有责任的；应承担责任的；
例句：His critics maintain that he's responsible for many of Algeria's ills.
他的批评者们坚持认为他应该为阿尔及利亚所面临的许多难题负责任。
4. in favor of 支持；赞成；
例句：I had a feeling he was in favor of the plan.
我觉得他赞成那个计划。