Because of low yield, saponin B was not identified.

皂甙b因得率极低，未能完成鉴定。

The drought made the potato had a low yield this year.

干旱使今年的马铃薯的产量很低。

The low yield doesn't seem to bother them much, even now.

即使现在，他们似乎并不太忧心低收益的问题。

Direct esterification will take long reaction time with low yield.

直接酯化法反应时间长，产率低。

Calm steel disadvantage is concentrated shrinkage, low yield, high price.

镇静钢的缺点是有集中缩孔，成材率低，价格较高。