Hello, here are the headlines on BBC world news.

大家好 这里是BBC世界新闻头条

The republicans have begun their national convention with dire warnings about the country's future if Joe Biden were to defeat Donald Trump in November's presidential poll.

共和党全国代表大会一开始就发出了可怕的警告 称如果乔·拜登在11月的总统大选中击败唐纳德·特朗普 美国的未来将会堪忧

Speakers claimed Mr. Biden would be a radically left-wing leader.

发言人声称 拜登将是一名激进的左翼领导人

Police in the U.S city of Kenosha have fired tear gas after crowds took to the streets for a second night despite an overnight curfew.

美国基诺沙市警方发射催泪瓦斯 此前有人群连续第二天晚上不顾宵禁走上街头抗议

The protests were a reaction to the police shooting of a black suspect on Sunday.

抗议活动是因为周日警察开枪射击了一名黑人嫌疑人

Emergency teams have rescued 60 people from the rubble of a residential building that collapsed in the town of Mahad in the west Indian state of Maharashtra.

西印度马哈拉施特拉邦的马哈德镇一居民楼倒塌 紧急救援队从废墟中救出了60人

Two people have died.

已有两人死亡

Africa is to be declared free from wild polio by the independent body the Africa Regional Certification Commission.

独立机构非洲区域认证委员会将宣布非洲已无野生小儿麻痹症

Nigeria is the last African country to be declared free from the disease.

尼日利亚是最后一个宣布摆脱该疾病的非洲国家