She found it hard to buckle down.
她很难专心做一件事情。
全力，开始认真从事She found it hard to buckle down.
她很难专心做一件事情。
You can't play around with this assignment; it's something that needs to be buckled down to seriously.
这次的任务可
是儿
, 需要认真去干。
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达内容亦
本软件的观点；若发现问题，欢迎向我们指正。
