质子轰击質子轟擊

zhì zǐ hōng jī

Meaning

proton bombardment

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Characters

质zhìessence, nature; material, substance厂十贝子zison, child; seed, egg; fruit; small thing了一轰hōngrumble, explosion, blast车双击jīto strike, to hit, to beat; to attack, to fight凵