sufficient可以加前缀in: 构成insufficient
Our reference book proved to be insufficient .我们的参考书显得不够。
This stemmed from insufficient appreciation of geochemical conditions .这是由于没有充分考虑地球化学条件。
The supply of sediment is insufficient to offset the rate of subsidence .沉积物的补给不足以抵偿沉降的速率。
Distance alone is insufficient to specify all properties at space .单靠距离还不足以把空间的所有性质说清楚。
In their day scientific knowledge was insufficient to settle the matter .在他们的时代，科学知识还不能足以解决这些问题。
