例句與造句

1. Weekly observation in a wheat field might give the following observations on stem rust during the course of an epidemic .
   在稈銹病的流行過程中，每周在小麥田中進(jìn)行觀測(cè)，得到如下結(jié)果。
2. An example is puccinia graminis , the stem rust of cereals and grasses , which overwinters on the barberry
   例如生活在禾草上，引起麥類稈銹病的禾柄銹菌，必須在在小?屬植物上越冬。
3. It's difficult to find stem rust in a sentence. 用stem rust造句挺難的