例句與造句

1. Sources of viable bacterial seed can be primary clarifier effluent, non-disinfected secondary clarifier effluent or a commercial seed preparation.
2. Sources of viable bacterial seed can be primary clarifier effluent, non-disinfected secondary clarifier effluent or a commercial seed preparation.
3. It's difficult to find clarifier effluent in a sentence. 用clarifier effluent造句挺難的