Now obviously the first thing is the core design and in the core design you have to really understand the type of fuel that you want to use.
现在很明显的，第一件事就是核心的设计，在核心的设计里，你们必须真的，了解你们想要使用的燃料种类。
The physical core is crystallized in magnetic iron-nickel alloy-composite. The core is not hollow.
物质核心是磁性铁镍合金复合材料的结晶，其核心不是中空的。
The catheters with core was selected in experiment group, and without core in control group.
实验组以带管芯的气管导管行盲探经鼻气管插管术，对照组则不带管芯。
In the design illustrated, the core pin is anchored by a local core-retaining plate.
图示的设计中，型芯杆是用一个局部的型芯挡板固定的。
In the design illustrated, the core pin is anchored by a local core-retaining plate.
图示的设计中，型芯杆是用一个局部的型芯挡板固定的。
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