1. 碰到(困难、反对等)：come up 走近;(从土中)长出 | come up against 碰到(困难、反对等) | come up to 达到;符合

2. 碰到(困难)：come up发生;走上前来;(时间)快到 | come up against碰到(困难) | come up to达到(高度、程度符合

3. 面对...困难：參考書 reference book | 面對...困難 come up against | 利息率,利率 the interest rate

4. 碰到：32.come up 出现 | 33.come up against 碰到 | 34.come up to 达到

1. 碰到;面对
If you come up against a problem or difficulty, you are faced with it and have to deal with it.

e.g. We came up against a great deal of resistance in dealing with the case.
办这个案子的过程中，我们遇到了很多阻力。