粮食产量

liáng shi chǎn liàng méi néng gēn shang rén kǒu zēng zhǎng de sù dù

粮食产量没能跟上人口增长的速度。

Food production is not keeping up with population growth.

liáng shi chǎn liàng tí gāo le

粮食产量提高了。

The crop yields have risen.