If you say that something is debatable, you mean that it is not certain.
例句
Whether we can stay in this situation is debatable...在这种情况下我们能否留下还很难说。It is debatable whether or not antibiotics would make any difference...抗生素能否起到什么作用还无法定论。
英汉词典释义
adj.
有争议的,有问题的,可争辩的
This is a highly debatable point.这是个爭议很大的问题。
英英词典释义
Adjective
1. open to doubt or debate;
"If you ever get married, which seems to be extremely problematic"