Pistoning
(piston 的現在分詞) n. 活塞, 活塞閥鍵\\n[醫] 活塞(如注射器的)
??? 情景例句
This will be a perfect jacket for the wintertime
這一件夾克就很受用
Well, goodbye. See you soon.
那么，再見。后會有期。
certainly it is more difficult than the arts which involve appreciation of flat forms,
欣賞雕塑品當然比欣賞平面的藝術品要難。