止

• Care must be taken to protect the focusing coils from stray magnetic fields .
  必须小心，以防止聚焦线圈产生寄生磁场。
• A ray is a line beginning at a certain point and extending indefinitely .
  射线是一根从某一点开始，无限止地延伸的线。
• The dread of fuss and bother, and of endless explanation, restrained her .
  她害怕混乱、纠纷和无止无休的解释，便克制了自己。
• Cysts should be excised and sterilized to avoid ingestion by the definitive host .
  应该切除包囊并予以销毁，以防止被最终宿主食入。
• The exposed wood protected with a wound-dressing compound to prevent fungal infection .
  伤口露出的木质应以敷料包裹以防止病菌侵染。
• He was feeling the satisfaction of doing a job at which he knew he was proficient .
  他心里止不住感到得意：做这种工作，他可是老手了。
• It was a warning that things might get out of hand if the offensive did not stop .
  这是一个警告，说明如果攻势不停止，事情可能会失去控制。
• One valve is the pressure-relief valve, which prevents pressure in the tank from rising too high .
  一个是减压阀，以防止油箱中的压力过高。
• All existing web cracks were arrested by drilling 19 mm holes at the ends of the cracks .
  所有已存在的腹板裂纹都在裂纹端部钻19mm的孔止裂。
• Spraying with insecticides and fungicides may be necessary to control any insects and diseases .
  也许有必要喷洒杀虫剂和杀菌剂以防止病虫害。