1. 這個村子周圍有湖泊與沼澤地，隔斷了與外界的聯(lián)系。
   The village is shut off from the world by lakes and marshes.
2. 先天論，天性論先天論，大腦不能從外界信息中產(chǎn)生想法
   The doctrine that the mind produces ideas that are not derived from external sources.
3. 矯作物非正常出現(xiàn)而是由外界因素或作用所產(chǎn)生的一種結構或物質(zhì)，如經(jīng)固定后，在顯微鏡下才能看到的標本中的一種活生命組織中不會出現(xiàn)的結構
   A structure or substance not normally present but produced by an external agent or action, such as a structure seen in a microscopic specimen after fixation that is not present in the living tissue.
4. 耳鳴一個耳朵或兩耳中的聲音，如嗡嗡聲或哨聲，在沒有外界刺激的情況下發(fā)生，通常由某種特定情況如耳朵感染、使用某種藥物、聽覺管道堵塞或頭部受傷引起
   A sound in one ear or both ears, such as buzzing, ringing, or whistling, occurring without an external stimulus and usually caused by a specific condition, such as an ear infection, the use of certain drugs, a blocked auditory tube or canal, or a head injury.
5. 我們需要外界援助才能完成。
   We'll need outside help before we can finish.

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