learn by oneself

learn by oneself

题目
learn by oneself
顺便帮忙同义句转换下
同义句转换 My sister taught herself japanese when she was 15.
My sister ( ) Japanese ( ) ( ) when she was 15.
答案
by oneself,靠某人自己,固定搭配
My sister ( learned ) Japanese ( by ) ( herself ) when she was 15
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