directorate的复数形式为：directorates...

Biolar shift registers are classified as unidirectional and bidirectional.双极型移位寄存器可分为单向和双向两种.He attempted to investigate bidirectional streaming by inoculating two dishes with R. oryzae.他试图研究双向流动的问题,他把未根霉接种于两个培养皿.There a...

同向...