1. 養(yǎng)殖對動物的飼養(yǎng)或植物的種植，尤指為了產生改良品種
   The breeding of animals or growing of plants, especially to produce improved stock.
2. 不悔改的未在精神上自新或改良的；不慚愧的
   Not spiritually renewed or reformed; not repentant.
3. 社會改良空想家幼稚的理想主義者，支持善心或博愛的事件的改革者
   A naive idealist who supports philanthropic or humanitarian causes or reforms.
4. 要不是這些實驗，這部機器也許就不可能改良了。
   If it had not been for these experiments, the improvement of the machine would have been impossible.

改的英語翻譯：

良的英語翻譯：