但是生物燃料技术始于一个很小的规模，而那时谷物过剩却很常见。

But biofuel technology began on a small scale, and grain surpluses were common.

youdao

但是生物燃料技术始于一个很小的规模，而那时谷物过剩却很常见。

But biofuel technology began on a small scale, and grain surpluses were common.

youdao