Dr Dayan says it could take two to three lifetimes for them to disappear from the population.

达扬教授称，可能需要两到三代人才能令阻燃剂在人群中消失。

youdao

Just two or three lifetimes ago, most people in what are now called industrialized countries lived by farming.

在现在称之为工业化国家，仅仅在两三代人之前，大家都是生活中农业社会。

youdao

Among souls seeking Mastery, approximately one of every three or four lifetimes, is a lifetime chosen for solitude.

那些追求自主的人大约三到四次轮回中就有一世会选择独处。

youdao

Rosenberg has had exclusive buying arrangements with all three painters during much of their creative lifetimes, and every painting in his collection was bought directly from the artist.

FORBES: Just How Rich Are Dominique Strauss-Kahn And His Wife Anne Sinclair?

In Washington, three out of every four black men can expect some time behind bars in their lifetimes.

CNN: We're obsessed when it's white women in trouble

In a previous era, it would have taken Alexandra Wallace several lifetimes to even encounter as many Asian students as she managed to offend in three minutes.

FORBES: Jimmy Wong Saves the Internet