第四：你最重要的部分不是你的包装而是你的内芯。
Fore:The most important part of you will always be what's inside.
设计了芯间距较小的特殊结构四芯光纤，可用于生成格子光场或用于制作光纤传感器。
A special four-core fiber has been designed and demonstrated, in which the internal distance between the neighbor cores is smaller.
大坝安全监测振弦式监测仪器一般采用四芯屏蔽电缆进行信号的输入和输出。
The four-core shielded cable is generally used for the vibrating monitoring apparatus to input and output signals in dam safety monitoring.
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