two pln.对讲电话线twonum.二；两个two-leg slide双腿滑档two-wheel hoe双轮手推锄two compartment二分隔two way circuit双向电路two - storyed双层two-foot stop双脚停two pole switch双极开关two port system二端口系统two-way cross二品种杂交, 二元杂交, 二品种杂种, 二元杂种two-way clamp双向箝位