diffusion n. 1.散布,發(fā)散。 2.傳播,普及。 3.冗長(zhǎng)。 4.【化學(xué)】滲濾。 5.【物理學(xué)】擴(kuò)散,漫射。 the diffusion of knowledge 知識(shí)的傳播。 diffusion of speech 演說(shuō)的冗長(zhǎng)。 diffusion of light 光線的漫射。
'd 〔口語(yǔ)〕 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.