例句與造句

1. thirdly, cobalt 60 disinfection method is adopted . fourthly, its outer package is air-tight . it is isolated from the outside
   第三器械盒的消毒采用了鈷60消毒法，消毒更安全，更徹底。
2. It's difficult to find cobalt 60 in a sentence. 用cobalt 60造句挺難的