这架相机的测距器很管用.The range finder in this camera is really good.测距器使用数码管显示目标物的距离.The device uses LED digital display to show the distance of sighting vane....
The actue toxic effect of heavy metal Cu ~ ( 2 + ) to Stentor Polymorphrus ( Ciliophora, Heterotrichida ) was studied.研究了重金属铜对异毛目纤毛虫多态喇叭虫 ( Stentor polymorphrus ) 的急性毒性影响....