But all of that are usually discommodious and insecure to some extent, for example toting, forgetting, losing and peculating and so on.
但各种措施都

少地伴随着要携带、
遗忘、
丢失、被盗用

便和
安全的因素。
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Today, astronauts can still carry NASA-approved personal items and mementos aboard missions, but coins, stamps, and postal materials that, " by their nature, lend themselves to exploitation by the recipients" , are forbidden by federal regulation.
如今,宇航员仍可在任务中携带美国国家航空航天局批准
个人物品

品,但根据联邦法规,硬币、邮票及邮政材料等“因其性质易被收件人利用”
物品则被禁止携带。