关于learn的翻译汤姆昨天自己学会了游泳（learn ……by oneself）能用learn doing 吗?我绝对

关于learn的翻译汤姆昨天自己学会了游泳（learn ……by oneself）能用learn doing 吗?我绝对 learn...by oneself是什么意思? learn by oneself learn by doing的解释 learn by doing 的音标 learn by oneself 同意词? 英语翻译：learn by oneself English sb learn sth by oneself learn by doing. 是什么意思? Learn by doing “learn by oneself English”和“learn English by oneself”哪个是对的? learn by doing中by的意思