billions of sth
billions of 后接复数名词，表示数量极大。
Billions of people watched the final.
数十亿人观看了决赛。
万亿；大量；无数；表示1后面加12个零的数字；在英国,常采用美式用法(即1后面加9个零)；极大的不确定数字(通常为夸张说法)；表示1后面加9个零的数字
the number 1,000,000,000; a thousand million
美式用法，也是现代英式常用的含义。
表示1后面加12个零的数字；在英国,常采用美式用法(即1后面加9个零)
the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen
极大的不确定数字(通常为夸张说法)
a very large indefinite number (usually hyperbole)
表示1后面加9个零的数字
the number that is represented as a one followed by 9 zeros
The new bridge cost over a billion dollars to build.
这座新桥的建造耗资超过十亿美元。
用法提示：billion 作名词，表示“十亿”，与冠词 a 连用，强调具体数量。
The population of the country is nearly one billion.
这个国家的人口接近十亿。
用法提示：billion 作名词，这里用 one billion 表示“十亿”这个具体数字。
The company's total assets are valued at three billion.
该公司的总资产估值达三十亿。
用法提示：billion 作名词，与数词 three 连用，表示“三十亿”的具体数量。
billions of 后接复数名词，表示数量极大。
Billions of people watched the final.
数十亿人观看了决赛。
具体数字后直接跟 billion，billion 不用复数形式，也不加 of。
The company is worth two billion dollars.
这家公司价值二十亿美元。
billions 可单独使用，作主语或宾语，指代不确定的巨额数量。
Billions were spent on the new railway.
这条新铁路花费了数十亿。
grammar · medium
易错句子The company is worth five billions dollars.
正确表达The company is worth five billion dollars.
billion 前面有具体数词（five、three、1.4 等）时要用单数形式，不能加 -s；只有表示不确定的“数十亿”时才写成复数 billions of。所以是 five billion dollars。
grammar · medium
易错句子Billions people around the world watched the game.
正确表达Billions of people around the world watched the game.
表示不确定的“数十亿”时，结构是 billions of + 复数名词，of 不能省略；billions 后面直接接名词是错的。
grammar · medium
易错句子She earns a billion of dollars a year.
正确表达She earns a billion dollars a year.
billion 前面已有 a 或数词时，它直接修饰后面的名词，中间不加 of；“a lot of”的 of 不能类推到这里。
数十亿的；数以十亿计的
Billions of people watched the final.
数十亿人观看了决赛。
数十亿美元
The government spent billions of dollars on the project.
政府在这个项目上花费了数十亿美元。
五亿
Half a billion people live in that region.
那个地区住着五亿人。
无数次（夸张说法）
I've told you a billion times to tidy your room.
我已经跟你说过无数次，把房间收拾干净。
赚得数十亿；赚大钱
Tech firms made billions during the boom.
科技公司在繁荣期赚了数十亿。
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