twicern.做二次的人
twiceadv.两倍;两次
twice-forbidden transition二次禁戒跃迁
twice differentiable function二次可微函数
Twice weekly I go swimming.每星期我去游泳两次。
Twice cooked spicy pork slices回锅肉片
twice supplying water pollution二次供水污染
Twice prestressed continuous beam二次预应力连续梁
twice three dimensional searching两次三维搜索
twice continuously differentiable二次连续可微
twice continuous differentiability连续性及二次连续可微性