Billy: Are you ready to go shopping?
Jennifer: Not yet. I'm not finished with my research yet.
Billy: What research?
Jennifer: Reading my fashion magazines! How do you think I know so much about all the latest trends?
Billy: But they're just ads...
Jennifer: Duh...That's the point. The people in the ads are wearing what's in. Plus, there are articles on new trends...

trend (n.) 　
潮流
A: Do you follow the latest fashion trends? 你会跟随最新的流行吗？ B: They change too fast. I can't keep track of what's trendy. 流行变化太快。我跟不上什么是潮流。

in (a.) 　
现下最流行的

比　利：你准备好要去血拼了吗？
珍妮花：还没。我的研究还没做完。
比　利：什么研究？
珍妮花：看我的流行杂志！你以为我是怎么知道这么多最新流行信息的？
比　利：它们不过都是些广告……
珍妮花：蠢……这就是重点。广告里的人穿的都是最流行的。此外还有报导最新流行的文章……