At this rate , the fourth dimension is bidirectional .
这样看来，第四维度是具有双向性的。
The tunnel is designed to be 9km long with bidirectional four lanes .
这条隧道设计为双道4线9公里长。
Notwithstanding the likely bidirectional nature of the findings , the authors suggest that their study has clinical implications-namely that identification and treatment of depression in midlife women may ameliorate the experience or severity of menopausal complaints .
