AX and Y must have been in place X和Y必然都已经就位
BX must be in place while Y is not necessarily X必然就位,而Y未必
CY must be in place while X is not necessarily X未必就位,而Y必然
DNeither X nor Y are necessarily in place X和Y都未必已经就位
Copyright © 2020 www.daanwo.com All Rights Reserved |