come up against problems遇到问题
come up against detail突然碰到
come up against new problems遇到新问题
PHRASAL VERB(动词词组) If you come up against a problem or difficulty, you are faced with it and have to deal with it. 面临
We came up against a great deal of resistance in dealing with the case.
我们在处理该案件时碰到了很多阻力。