However, black holes should not be completely black, as Hawking explained in 1974.

但是，就像霍金在1974年解释的那样，黑洞不会是完全黑的。

youdao

In time,however, there was another reason to fight: to free the black people held as slaves in the South.

VOA: special.2009.10.08

However,black people sitting in that part of the bus were expected to leave their seats if a white person wanted to sit there.

VOA: special.2009.03.08

At that time, however, black singers were not permitted in white opera companies in the United States.

VOA: special.2009.01.25

However Black Caribbean students are far better represented in subjects such as law, political studies and librarianship.

BBC: Science

However, Black said boys and girls are welcome to join even if not from Seventh-day Adventist families.

WSJ: Amid Boy Scout turmoil, other groups hope to grow

However Mr Black welcomed an announcement on a mortgage guarantee scheme for first-time buyers, agreed with the Lib Dems as part of budget negotiations.

BBC: Welsh government ?3.5bn spending plans repackaging row