这个房间有股霉味，一定是好久没有人住了的英文

the room smells of stale air. it must have been vacant for a long time

• 这个:    this one; this
• 房间:    room; chamber; hou ...
• 有:    5年 fifteen years
• 股:    thigh; haunches
• 霉:    mould; mildew
• 味:    taste; flavour
• 一定:    fixed; established ...
• 是:    Semantics
• 好久:    for a long time; l ...
• 没有:    not have; there is ...
• 人:    human being; man; ...
• 住:    live; lodge; resid ...
• 了:    finish; complete; ...