- ds區元素
- d區元素
- d: CD = 400. DC = 600.
- block: n. 1.片,塊,大塊;粗料,毛料;木料;石料;金屬塊; ...
- d-block elements d: 區元素
- d-c block: 直流閉塞
- 'd: 〔口語〕 1.= had: I'd ... = I had .... 2.= did: Where'd ... = Where did .... 3.= should (或 would): He'd ... = He should (或 would). 4.=-ed: foster'd.
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