be well up in

大学英语三级考试常考词组和固定搭配 - 豆丁网 ... be useful to 对…有用 be well up in 精通，熟悉 be wild with jay 欣喜 ...

大学英语三级考试常考词组和固定搭配 - 豆丁网 ... be useful to 对…有用 be well up in 精通，熟悉 be wild with jay 欣喜 ...

查找带“UP”的英语词组 - 已解决 - 搜搜问问 ... be up 发生；出事 be well up in 对…知道得很多 up for 打算；准备 ...