单词：observe up on
observe up on的用法和样例：
例句
- The event was on everyone's tongue.每个人都在谈论那件事。
- She tattled on her estranged husband.她在背后谈论与她分居的丈夫的私事。
单词：observe up on 相关文章
obey v.服从，遵守 object n.物体；目的；对象 v.不赞成，反对 objection n.反对，异议 objective n.目标，宗旨 a.客观的；外界的，真实的 obligation n.义务，职责；恩
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