House prices keep rising and falling but they should eventually even out.
房价一直时涨时落，但最终应该会趋于稳定。
Rising and falling have safety alarm device.
上升下降有提示报警安全装置。
Remember that intonation is the rising and falling of the pitch of your voice.
语音语调也是英文口语练习中的重点。
Remember that intonation is the rising and falling of the pitch of your voice.
语音语调也是英文口语练习中的重点。
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