You know, too, what a black reaction comes upon you.

你也知道它会引起什么样的不良反应。

youdao

In a letter to a friend, he describes the discovery of la reazione nevo (the black reaction)

在一封写给朋友的信中，Golgi描述了这个方法里的黑色反应

youdao

After two decades, 95 percent of the elemental mercury on the surface of a filling had gone through a chemical reaction. It became beta-mercury sulfide, a black-colored solid.

经过了20年的光阴，旧填充物表面有95%的汞元素已经发生了化学反应，它变成了黑辰砂(beta - mercury sulfide)，一种黑色的固体。

youdao

Miss Simone wrote the song in reaction to extreme violence against black Americans.

VOA: special.2009.10.04

This has caused a reaction among so-called Black Widows.

VOA: special.2010.04.03

Meanwhile, leading black Democrat politicians, used to complaining about over-reaction, have called for tougher action.

ECONOMIST: Fear is back

And it added in one case, a woman using black cohosh needed a liver transplantation after a particularly severe reaction.

BBC: Some women are using alternative therapies instead of HRT

"When five black people appear to be shot by a white person, then the immediate reaction is there is a racial component, " Tulsa Mayor Dewey Bartlett told CNN.

CNN: Police probe possible racial motive in Tulsa killings