玩具是其中的一个不可缺少的方面你鹦鹉的存在。
Toys are one of those indispensable aspects of your budgerigar's existence.
可以说用户离网管理是客户生命周期中一个不可缺少的环节。
Can say users from the network management is an indispensable link in the customer life cycle.
在塞尔维亚前途未卜的那些秋日，这些特点让他成为一个不可缺少的人物。
Those traits made him indispensable during those autumn days, when the future of Serbia hung in the balance.
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