良种 (liáng zhǒng) — improved variety (of seeds or livestock); fine breed

定義

例文

• 农民们选择良种来提高产量。
  Nóng mín men xuǎn zé liáng zhǒng lái tí gāo chǎn liàng.
  Farmers choose improved varieties to increase yields.
• 这家农场引进了新的良种牛。
  Zhè jiā nóng chǎng yǐn jìn le xīn de liáng zhǒng niú.
  This farm introduced new fine-breed cattle.
• 良种的培育需要很长时间。
  liáng zhǒng De péi yù xū yào hěn cháng shí jiān.
  The cultivation of improved varieties takes a long time.