例句與造句

1. Study on supporting roller bush made of za303 high - toughness abrasion - resistant alloy
   303高強(qiáng)韌耐磨合金回轉(zhuǎn)窯托輪瓦研究及應(yīng)用
2. It's difficult to find roller bush in a sentence. 用roller bush造句挺難的