She’s been beavering away at her homework for hours.她连续几个小时都在忙着写作业。She's been beavering away at her homework for hours.她连续几个小时都在忙着写作业.They are beavering away to get everything ready for us.他们正在竭尽全力准备我们所需的一切。We watch...
It is crucial that all documents presented are authentic and easily verifiable.所有提交的文件必须真实且易于查证，这一点很关键。She never participated in obtaining or copying any classified documents for anyone.她从未参与过为任何人获取或复制机密文件之事。Last year, h...