7 [attrib 作定语] strict; rigorous 严格的; 严厉的 *in close confinement 被严密监禁 * be (kept) under close arrest, ie carefully guarded 被严密拘禁（戒备森严） ..
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in close confinement
在密闭禁闭中
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Animals kept in close confinement, reared at close quarters, will inevitably infect one another very quickly.
BBC: The pointless slaughter?
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