The rocks, found in a belt of ancient bedrock in Quebec, are estimated to be 4.28 billion years old.

这些岩石是在加拿大魁北克省的一个古岩床带发现的，据估计距今已有42.8亿年历史。

youdao

The low fertility belt runs from the Mediterranean to central and eastern Europe, embracing both old and new parts of the continent.

低生育带从地中海开始直到欧洲中部和东部，环抱大陆的新旧地区。

youdao

The 54-year-old black belt in judo is the sixth new leader in five years; he risks being laughed off even before he starts.

他今年54岁，柔道黑带。 甚至在他还没开始竞选之前，就有许多人嘲笑他让他放弃。

youdao

It accuses Obama of taking the old industrial belt on a "wild ride" that will lead to more plant shutdowns and increased outsourcing to foreign factories.

FORBES: New Geographer

But the demographic challenges of the Big Orange and the Windy City pale compared to those faced by many cities in the old industrial Rust Belt, which have either lost population or posted only weak increases.

FORBES: America's Fastest- and Slowest-Growing Cities

It was an old bike with a broken belt and I had to fix it.

CNN: Rio's victory is a victory for Lula da Silva, too