They tried to whistle up some help.

他们想通过呼吁获得一些支援.

《简明英汉词典》

He had to whistle up some new ideas for lessons.

他只好勉强给上课的教材添些新内容.

辞典例句

Please whistle up all the dogs quickly.

赶快吹哨把狗召回来.

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Life's not easy for a good teacher whistle up new ideas for lessons every day.

当一名好老师不容易,每天都得为功课想出些新招.

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