这种疾病的症状直到患者从国外回来后才显现出来。
The symptoms of the illness became manifest only after the patient had returned from abroad.
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解释
manifest 作形容词，表示「明显地显露出来、显而易见」。
The symptoms of the illness became manifest only after the patient had returned from abroad.
manifest 作形容词，表示「明显地显露出来、显而易见」。