brown spot的用法和樣例：
例句
- The pathogen was identified as cucumber target leaf spot according to Koch's Postulation and biological characteristics.
根據柯赫氏法則和生物學(xué)特性，鑒定為黃瓜褐斑病，又叫靶斑病。 - The root yield and sugar content of tetraploid lines were higher than that of diploid lines.However, the Cercospora leaf spot resistance had no significant differences.
四倍體品系的根產(chǎn)量和含糖率均優(yōu)于二倍體材料，而褐斑病抗性差別不大。
