He always bragged about1 his strength.
他总是吹嘘自己力大无比。
A river of southern Ethiopia and southern Somalia flowing about1, 609km (1, 000mi) to the Indian Ocean.
朱巴河流经埃塞俄比亚南部和索马里南部的河流，流程约1,609公里(1,000英里)，流入印度洋。
Paragangliomas of head and neck are rare tumors that occur sporadically with the prevalence of about1 in30,000 of head and neck tumors.
头颈部副神经节瘤是一罕见偶发的疾病，盛行率约占所有头颈部肿瘤的三万分之一。
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