unforeseeable
adj. 不可预见的；无法预料的
例句
This is such an unforeseeable situation that anything could happen.
这是一个无法预见的情形，任何事都有可能发生。
《柯林斯英汉双解大词典》
Building a dam here could have unforeseeable consequences for the environment.
在这里修建水坝可能会对环境造成无法预料的后果。
《牛津词典》
Some mountain-climbing injuries are caused by unforeseeable weather conditions.
一些登山引发的损伤是由不可预见的风雨天气造成的。
