常速英语:乔治·弗洛伊德之死给美国带来的改变

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Standards in health care have improved enormously compared to 40 years ago.

与40年前相比，卫生保健的水平得到了极大提高。

2. per se 本身，本质上

The drug is not harmful per se, but is dangerous when taken with alcohol.

这种药本身无害，但与酒同服就危险了。