these怎么读this怎么读

this造句：1、This is a loose collection of users who come together for a short-or long-term effort.这是一组松散的用户，他们为完成短期或长期的工作而聚集在一起。2、This indicates the toxicity and potential carcinogenicity of domestic detergents on fish.研究结果表明了家用洗涤剂对鱼的毒...