flat or slightly concave
平坦或微凹
以上为机器翻译结果，长、整句建议使用 人工翻译 。
EARS: the membranes covering the inner ear should be either flat or slightly concave; ear abscesses are very common and can have fatal consequences if treatment is not obtained.
耳鼓：内耳孔上覆盖的耳鼓膜往往是平的或者微微凹陷；耳鼓鼓胀很常见，同时如果不经过及时治疗往往也很致命。
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