I don't think it possible to master a foreign language without much memory work.翻译下.

I don't think it possible to master a foreign language without much memory work.翻译下.
I don't think it possible to master a foreign language without much memory work.
翻译下.

I don't think it possible to master a foreign language without much memory work.翻译下.
我不认为熟记一门外语不花太多工夫来记忆是不可能的