单词	rifling
释义	rifling /ˈrʌɪflɪŋ / noun [mass noun] The arrangement of spiral grooves on the inside of a rifle barrel: he could clearly see the rifling of the bore... There's no rifling in the barrel, and you call it a rifle? The foremost portion of this auxiliary chamber incorporates many small rifling grooves to just stabilize the bullet before it engages the bore. In their six grooves, Colerain barrels feature round bottom rifling that holds less fowling; square bottomed grooves reportedly retain more fowling.
随便看	nothingly nothing much nothingness nothing of the kind nothing of the sort nothing (or nothing else) for it nothing succeeds like success nothing ventured, nothing gained nothingy Nothofagus nothomorph no-thoroughfare nothosaur no-thought no through road no-throw not-I notice noticeability noticeable noticeably noticeboard notice paper noticer notifiable

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