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His back pain and acid, used to carry the heavy barrel hands blistered.
他的背又酸又痛，用来提那重重的水桶的手也起了泡。
youdao
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Acid number of upgrading heavy oil had little change.
改质稠油酸值几乎没有变化。
youdao
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Acid number of upgrading heavy oil had little change.
改质稠油酸值几乎没有变化。
youdao