the fact of sth happening or existing 发生；出现；存在
a link between the occurrence of skin cancer and the use of computer monitors
皮肤癌的发生与使用电脑显示器之间的关联
the fact of sth happening or existing 发生；出现；存在
a link between the occurrence of skin cancer and the use of computer monitors
皮肤癌的发生与使用电脑显示器之间的关联