They leave school by ones and twos.

他们三三两两地离开学校。

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People began to leave the meeting by ones and twos.

大家三三两两地离开会场。

youdao

They began to leave the auditorium by ones and twos.

他们开始三三两两地离开了礼堂。

youdao

The return of Kevin Pietersen galvanised England and he batted beautifully and although he was clearly hampered by his Achilles injury and in no mood to run sharp ones or twos, he found the boundary five times, and cleared it three times as England improved on their 14 fours against the Dutch with 18 fours and six sixes here.

BBC: Jonathan Agnew column

Between overs eight and 14, Gambhir and Dhoni struggled to find the boundary, trading mainly in ones and twos, and India would not have been overly disappointed when Dhoni saw his stumps knocked back by Naeem Islam.

BBC: India too strong for Bangladesh

Not ones and twos but hundreds of organizations are looking to compete with the large scale multi-nationals by using technology as a differentiator.

FORBES: Asia Looking to Leapfrog in Big Data