Most of tinnitus is of unknown etiology.If it has pulsation the same as heartbeat, a neoplasm or vascular lesion should be impressed.是什么意思_Most of tinnitus is of unknown etiology.If it has pulsation the same as heartbeat, a neoplasm or vascular lesion should be impressed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句