learn about
词形变化：
形容词: learnable | 名词: learner | 动词过去式: learned/learnt | 动词过去分词: learned/learnt | 动词现在分词: learning | 动词第三人称单数: learns |
同义词：
study | discover | ascertain | find out | understand | pick up | hear | acquire | memorize | absorb | cram | swot | mug up | realize | gather | find | review | overhear | out | gain knowledge | determine | gain | knowledge | see | get wind | know | larn | take | get word | watch | check | instruct | read | con | teach | memorise | get a line | comprehend |
反义词：