您要查找的是不是：
- How effective is this drug? 这药的效力有多强?
- How effective is this as an answer to Toth? 这作为托斯案的解答有多大效用呢？
- How effective is laser therapy for smoking cessation? 激光戒断烟瘾的效果如何?
- How effective is Mirena compared to other birth control methods? 如何有效的是mirena相比于其他控制生育方法呢？
- Use of this drug is now fairly generalized. 这种药现在用得相当普遍。
- This drug is effective in treating malaria. 这种药治疟疾有效。
- How effective is our human resource management? Do we have an effective indicator for HRM performance? 我们的人力资源管理是否有效？我们是否有有效的评估人力资源管理的指标？
- This drug is very effective at the initial stage. 这种药在初期很有效。
- After all, how effective is an act of contrition -- whether proffered over the Web or otherwise -- that comes many, many years late? 毕竟，无论是通过网络或是其他途径，迟来很多很多年的忏悔行为有什么用？
- How much longer is this going to drag on? 这事还要拖多久?
- How much is this parcel to Vancouver, please? 请问这包裹寄温哥华要多少邮资？
- It has been demonstrated that this drug is effective. 这药已证实是有效的。
- This drug can increase the chance of conception. 这种药物可以提高怀孕的机率。
- An overdose of this drug can kill. 这种药服用过量可引起死亡。
- Is this equipment tested for mechanical aptitude? 这台设备测定了其机械适应性了吗？
- This drug can make some people violently ill. 这药使用后会使一些人感到极其不舒服。
- How effective quick cure tooth is swollen? 怎么有效快捷的治疗牙肿?
- Is this reference book of any use to me? 这本参考书对我有用处吗？
- 1．How effective is Epi-Derm on older scars? Epi-Derm对于旧伤疤的效果如何？
- It is this molecular motion that we call heat. 就是这种分子运动我们称之为热。
