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单质 | |
avia. | simple substance |
chem. | elementary substance |
绝缘 | |
el.mach. | insulate |
environ. | insulation |
hydroel.st. | insulation |
oil transp. | isolator |
sport. med. | isolation |
steel. | seal |
| |||
simple substance | |||
elementary substance | |||
element |
单质 : 331 phrases in 43 subjects |