a. of a quantity not able to fulfill a need or requirement
a. 不够的, 不能胜任的, 不充足的
[法] 不足的, 不充分的, 不能胜任的
1. The amount of money we have is insufficient for the trip.
我们拥有的钱对这次旅行来说是不够的。
2. She felt insufficient support from her friends during tough times.
在困难时期，她感到朋友们的支持不够。
3. The report was deemed insufficient to make a final decision.
报告被认为不够充分，无法做出最终决定。