Packing up again with no picnic, Zack had to switch schools for the second time and space is even tighter.
扎克再次收拾行装，这并不轻松，他不得不第二次转学，而空间也更紧张了。
Real-time switch can provide user with the function of hard real-time communication in microsecond, and it can be used in the field of aviation and space flight broadly.
实时交换机可为用户提供微秒级硬实时通信性能，在航空航天领域具有广阔的应用前景。
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