“不能自制”常见的英文表达有 “can't control oneself” 或 “be unable to restrain oneself” 。
can't control oneself：强调无法对自身行为、情绪等进行约束。例如：When he sees sweets, he can't control himself and eats too many.（当他看到糖果时，他就不能自制，会吃太多。 ）
be unable to restrain oneself： “restrain”有“抑制、克制”之意，此表达更侧重于强调难以抑制内心的某种冲动或欲望。例如：She was so angry that she was unable to restrain herself from shouting.（她气得不能自制，大喊起来。 ）