任务繁重。
电池行业等同、等效采用国际标准或国外先进标准任务繁重。
It is a heavy task to identically or equivalently adopt international standards and advanced overseas standards for battery industry.
由于交货任务繁重,他们不能把交货日期从六月份提前到四月份。
Owing to heavy commitments, they cannot advance delivery from June to April but they understand perfectly that July is the selling season for shirts in your market.
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