adjective 下载 🔗分享 不易察觉,难以察觉。 Not perceptible, not detectable, too small in magnitude to be observed Examples : "We all missed the imperceptible shake of his head as he tried to warn us without being seen." 为了不被人发现,他试图警告我们,我们却都没注意到他那几乎无法察觉的摇头。 sensation physics science amount quality 与AI对话词汇游戏阅读练习