attachment
[əˈtætʃmənt]
n.
（用电子邮件发送的）附件，附属物;
依恋，依附;
扣押财产逮捕，扣押（人，财产）;
例句:
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Mother and child form a close attachment.
母子情深。
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a child's strong attachment to its parents
孩子对父母的强烈依恋
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She has a great attachment to her sister.
她十分依恋她的姐姐.
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My relationship to my car is one of non-attachment.
来自VOA
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Click one of the two file attachment options above.
来自BBC
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Her attachment to barroom company affects her friendships too.
来自WSJ