乌龟背上有硬壳.A tortoise has a shell on his back.他们砸开坚果，剥去硬壳。They cracked the nuts and removed their shells.国务秘书从他的官员的硬壳里伸出了柔软的脑袋.The secretary had put forth his soft head from the official shell....
用测听仪器检测受调查儿童.The hearing screening of the children surveyed by audiometry instruments.言语测听法采用专门编制的测听词表来检查患耳的言语识别率.Speech audiometry adopts special testing speech tables to measure patients speech discrimination score.本文介...
We continuously inject a tracer into a point in a steadily moving fluid.我们连续地将一种示踪物注入某稳定运动流体中之一点.When ~ ( 238 ) Pu is used as a tracer, its recovery is 77±10 %, with activity being 0.29 dpm.当使用~ ( 238 ) Pu作示踪剂, 强度在0.29dp...