It relies chiefly on mineral export.

它主要依靠矿物出口。

youdao

A man's success depends chiefly on himself.

一个人的成功主要靠自已。

《新英汉大辞典》

For instance, an increase in consumption would benefit Florida, which gets the bulk of its revenues from a sales tax, more than Oregon, which relies chiefly on income tax.

比如，与俄勒冈州相比，消费增加对福罗里达州更是利好消息，因为福罗里达州的主要收入来自消费税，而俄勒冈州则主要依赖所得税。

youdao

Chiefly what we hear about is in the area of the Nile Delta, right there on the Mediterranean Sea.

绝大部分都集中在,尼罗河三角洲地区,就在地中海入海口

耶鲁公开课 - 古希腊历史简介课程节选

South of the Aeolian section of that was the region of Asia Minor inhabited chiefly by Ionians, the people on the mainland who are the main Ionians are the Athenians.

位于小亚细亚地区的伊奥利亚南部,主要居住爱奥尼亚人,而在内陆居住的爱奥尼亚人,主要都是雅典人

耶鲁公开课 - 古希腊历史简介课程节选

But that is not what is on offer, chiefly thanks to differences in the legal systems on the two sides of the Atlantic.

ECONOMIST: Class actions

Successful economic development depends chiefly on striking the right balance between government support and private sector investment.

FORBES: Russian High Tech in Focus at St. Petersburg Forum

Most dollars going to Central America are spent on consumer goods chiefly made in Japan, Korea and China.

CENTERFORSECURITYPOLICY: The national security case for CAFTA