By now this had become a major preoccupation for him.

现在这已成为他的当务之急。

Their chief preoccupation was how to feed their families.

他们关注的首要事情是如何养家糊口。

He always takes his preoccupation with the educational cause.

他总是心着教育事业。

He put a preoccupation with the opportunity to speak, like a bandit squatting on roadside, ready covetously to a highway robbery.

他是神贯注寻找发言机会的人，就像蹲在路边虎视眈眈准备拦路抢劫的强盗样。