而甲状腺功能衰退症本身则是由出生异常，自身免疫疾病或者包括甲状腺切除手术在内的外科手术等引起的。
Hypothyroidism itself is caused by birth abnormalities, autoimmune diseases or surgery involving the removal of the thyroid.
病毒感染导致免疫系统发生进行性衰退，最后出现“免疫缺陷”。
Infection with the virus results in the progressive deterioration of the immune system, leading to "immune deficiency."
专家说，在越来越全球化的经济环境中，笔译和口译对国家经济衰退的免疫力使得对能说多种语言的人的需求激增。
Translators' and interpreters' relative immunity to the nation's economic down turn also highlights the growing demand for multilingual speakers in an increasingly globalized economy, experts said.
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