HSK 7-9
繁重
fánzhòng形
heavy; burdensome; heavy-duty; arduous
团队共同承担繁重任务。
Tuán duì gòng tóng chéng dān fán zhòng rèn wu.
The team jointly bears a heavy workload.
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Appears across levels (7-9) in the HSK 3.0 word list.