Even though the paint was often sprayed on by mouth, one can assume that the dominant hand assisted in the operation.

尽管油漆通常是用嘴喷上去的，但我们可以假定惯用手在操作中起了辅助作用。

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Thee adoption of double-hand operation ensures safety for operators.

采用双手操作开关，保证操作员工的安全性。 。

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One hand operation, takes less than 20 seconds.

单手操作，整个工作只需不到20秒。

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He's extended the hand of co-operation to the two new Labour leaders, Alan Rhodes and Derbyshire's Anne Western.

BBC: County leaders to share the load over budget pressures

Yet if they are failing to tackle deep-seated problems across the province, such as segregation in housing and education, they are leading by example: their political co-operation has gone hand in hand with remarkably improved personal relations.

ECONOMIST: Elections in Northern Ireland

If Israel's security forces find themselves struggling to contain Israeli anti-withdrawal protesters on the one hand, while conducting a big operation to stop Palestinian rocket attacks and suicide-bombings on the other, they might find it impossible to evacuate the Gaza settlers in safety.

ECONOMIST: The truce under severe test | The