Reports say Brazil's Jair Bolsonaro focused on trade cooperation as Russia is a key source of fertilizers.

报道称，巴西总统雅伊尔·博尔索纳罗重点讨论了贸易合作，因为俄罗斯是化肥的一个重要来源。

Moreover, state institutions have colluded with criminal networks, which, in some regions, have become a key source of power.

而且，州机构与犯罪网络相勾结，这些犯罪网络在一些地区已经成为关键的权力中心。

UN Agency has been a key source of the humanitarian aid for hundreds of thousands of Syrians. Jim Muir reports.

联合国机构一直是叙利亚数十万人人道主义援助的关键来源。Jim Muir报道。

In Bosnia and Herzegovina, hydropower is a key source of electricity, and it could help the country transition away from fossil fuels.

在波斯尼亚和黑塞哥维那，水力发电是主要的电力来源，它可以帮助该国摆脱化石燃料的使用。

Analysts suggest it's a key source of income for Mexico's drug cartels, but earlier this week, Mr Obrador denied Mexico produced the drugs.

分析人士表示，这是墨西哥贩毒集团的主要收入来源，但本周早些时候，奥夫拉多尔否认墨西哥生产此类毒品。

As in America, she says, dairy has become a key source of iodine: only 40% of European countries have mandatory salt-iodisation policies.

她说，和美国一样，乳制品已经成为碘的主要来源：只有 40% 的欧洲国家有强制性食盐碘化政策。

The data from Moving to Opportunity continues to be studied to this day and is a key source of research into how neighborhoods affect families’ well-being.

“走向机遇”的数据至今仍在继续研究，并且是研究社区如何影响家庭福祉的关键来源。