improper handling

基本解释

One hopes that the regulations may at least prevent some food poisonings caused by the improper handling of fish and shellfish.
人们只有寄望于，这些规定或许至少可防止某些因鱼类和贝类处理不当引起的食物中毒。
blog.sina.com.cn
A: Disputes over territory and sovereignty are highly sensitive, improper handling of which will have a serious impact on the overall interest of China-Japan relations.
答：领土主权争议高度敏感，处理不当，将对中日关系大局造成严重冲击。
www.fmprc.gov.cn
Furthermore, transport of seafood imports over long distances presents opportunities for contamination and decomposition due to improper handling and refrigeration.
此外，进口海鲜长距离的运输过程会由于处理或者制冷出现错误给了微生物污染和分解的机会。