您要查找的是不是：
- I wonder what I can do about improving my grades. 我不知道能用什么办法提高自己的学习成绩。
- improving purebred 改良纯种
- He is certainly improving in his spelling. 他的拼写大有改进。
- Her health is improving by leaps and bounds. 她的健康迅速好转。
- Recorded descent from purebred stock. 良种，有记载的纯种出身
- His health is improving step by step. 他的健康状况正在逐步好转。
- Her health is improving little by little. 她的健康状况正在逐渐好转。
- Their working conditions are improving. 他们的工作条件正在改善。
- His English is improving little by little. 他的英语渐有提高。
- The patient's condition is improving day by day. 病人的病情逐日好转。
- Blood: Recorded descent from purebred stock. 良种:有记载的纯种出身。
- Many captive tigers are of purebred ancestry. 很多被俘获的老虎都为纯种虎。
- Notices find pig: I lost a purebred Landrace small. 寻猪启事：本人丢失纯种小白猪一只。
- She's putting a lot of work into improving her French. 她正在下功夫进修法语。
- The others gave some pointers on improving the method of operation. 其他同志则出了一些点子来改进操作方法。
- The management are looking for ways of improving productivity. 管理部门正在设法提高生产率。
- We must concentrate our efforts on improving education. 我们必须致力於改进教育工作。
- Their English pronunciation is not good, but it is improving. 他们的英语发音不够好，但正在改进。
- This is the essence of the purebred dog: predictability. 对于纯种狗，这是最基本的。
- Rachel: Excuse me!But this is a purebred, show-quality Sphinx cat! 这里提到的是一种被毛极短的史芬克斯猫，看起像是被扒了皮一样。
