单词	左导数
释义	dérivée (à gauche, regressive)
随便看	tetragonal tetragone tetragonia tetragonidie tetragonolobe tetragonometrie tetragyne tetrahalogenobenzene tetrahalogenure tetrahexaedre tetrahydrate tetrahydrobenzene tetrahydrocannabinol tetrahydrofuran tetrahydronaphtalene tetrahydroparoxazine tetrahydroxozincate tetrahydrure tetraiodephenolphtaleine tetrakalsilite tetrakis tetrakishexaedre tetralcoyl tetraline tetralogie 浓淡点浓淡适宜浓烟滚滚浓痰浓眉浓眉大眼浓积云浓缩浓缩机浓缩柱山中寡妇山中寡妇山中寡妇山中寡妇山中寡妇山中寡妇山中寡妇 - 唐·杜荀鹤山中惜花山中无历日，寒尽不知年。山中有僧人不知，城里看山空黛色。