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Conceal sth. from sb.
-- He concealed his disappointment from his friends.（disappointment n.失望）
Hide vt.vi.（hid, hidden, hiding）隐藏, 把…藏起来
-- When her mother came in the little girl hid behind the curtain.（很口语话）
Destroy vt.破坏, 毁坏 v.消灭, 摧毁（完全摧毁, 不可修复）
-- To tell the patient the truth is to risk destroying his hope.
-- The earthquake destroyed almost the entire city.
Damage vt.损害, 损坏, 使受损失（可以被修复）
-- The car is damaged and it is be repairing now.
Occur vi.发生, 出现（某个事件出乎意料的、偶然的发生）-- 比happen更正式
-- When did the accident occur?
It occurred to me to do… / It occurred to me that…
-- It occurred to me to open the window.
