Her tears were only for effect. [=she was crying or pretending to cry to make people feel sympathy for her]她的眼泪仅仅是为了博得别人的同情。

The movie exaggerates his odd habits for comic/humorous effect.电影为达到喜剧/幽默效果夸大了他的怪癖。

Before making the announcement, he paused for dramatic effect. [=he paused to make the announcement more dramatic]为了达到激动人心的效果，他在宣布之前稍微停顿了一下。