Yabla

所以 suǒyǐ

下坡 xiàpō

怕 pà

他 tā

跟不上 gēnbushàng

就 jiù

给 gěi

带 dài

上 shàng

了 le

so we brought him along since we were afraid he couldn't keep up when we went downhill.

经济学家 jīngjìxuéjiā

经常 jīngcháng

是 shì

错误 cuòwù

的 de

因为 yīnwèi

经济学家 jīngjìxuéjiā

永远 yǒngyuǎn

跟不上 gēnbushàng

科技 kējì

的 de

发展 fāzhǎn

Economists often make mistakes because they can never keep up with technological development.