期末考试前的最后一个月真的是段苦战。
The final month before finals was a real ___slog.
完成这个项目是个苦差事，我们连续加班了好几周。
Finishing this project was a real ___slog, with us working overtime for weeks.
孩子们在厚厚的雪地里艰难地行走。
The children ___slogged through the deep snow.
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