The helicopter turned at an awful angle before righting itself.直升机在恢复平稳之前倾斜得很厉害。Tourists were scrambling over the rocks looking for the perfect camera angle.游客们在正爬上岩石寻找最佳的拍摄角度。The tree was leaning at a low angle from the...
Conclusions: IVU and cystoscopy , especially retrograde ureteropyelography, were essential for the diagnosis of primary ureteral carcinoma.结果: 33例均为移行细胞癌,术前确诊21例,占63.6%....
Today many radioisotopes are produced using the particle accelerator called a cyclotron.今天许多放射性同位素是用被称为回旋加速器的粒子加速器来制造的.The cyclotron frequency can also be derived by an elementary argument.回转频率也可以通过浅显的论证导出来.How well is t...