helium
Definition
A chemical element, a light, non-reactive gas used in balloons, cryogenics, and as a coolant.
日本語 ヘリウム
Example
"The balloon floated upward because it was filled with helium."
A chemical element, a light, non-reactive gas used in balloons, cryogenics, and as a coolant.
日本語 ヘリウム
"The balloon floated upward because it was filled with helium."