improve on

1.He is looking to improve on his admittedly modest achievements so far.

迄今为止，他的成就的确不算大，他打算更进一步。

2.Knotless operation can reduce yarn defects and improve resultant yarn quality on a certain degree.

无接头操作法在一定程度上减低了纱疵,对成纱质量有很好的改善。

3.Achieves the result of experiment to improve anionic dyes' dyeability on the fabrics with triethanolamine,polyethyleneglycol during finishing.

研究结果表，液中添加三乙醇、聚乙二醇可大大离子染料对交联棉的可染性。

4.At the same time, to levy enough in time and operate macro-economic control well, levier should plan tax by improving on tax laws and enhancing the management of tax.

同样，征税主体为了依法尽可能及时征足税和发挥好税收的宏观经济调控职能，也需要通过完善税法和加强税收征管等途径进行征税筹划。