The cartilage in such areas is almost inextensible.这些部位的软骨几乎一点儿也不能伸展.Since the cord connecting the two blocks is inextensible, the accelerations are the same.由于连接两物块的绳子无伸缩性, 因此它们的加速度相同....

inextensible的音标：inextensible的英式发音音标为：[ˌɪnɪks'tensəbl]inextensible的美式发音音标为：[ˌɪnɪk'stensəbəl]...

adj.不能伸展的...