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n. 乱石;堆成的石基; vt. 用乱石筑基
n.乱石堆vt.用乱石加固
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n. 乱石;堆成的石基; vt. 用乱石筑基
n.乱石堆vt.用乱石加固
arbitratorship bedcover churchmanship kaka refluent snurfing sociotechnological