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It is usually economical to buy washing powder in large quantities.
大量购买洗衣粉通常要省钱些。
《牛津词典》
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For things like shampoo, soap or washing powder, buy the family pack.
洗发水、香皂或洗衣粉之类的东西，买家庭装。
youdao
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For things like shampoo, soap or washing powder, buy the family pack.
洗发水、香皂或洗衣粉之类的东西，买家庭装。
youdao