Traceless
a. 无痕迹的, 没留痕迹的\\n[法] 无踪迹的, 无痕迹的
🗣️ 情景例句
especially when he's a baby.
特别是当他还是个婴儿的时候。
We can live without a brother, but not without a friend.
我们生活中可以没有兄弟，但不能没有朋友。
is as the proportion of the total vocabulary of his mother tongue against those words of his own baby talk that are taken up into the vernacular of his family.
就好像他本国语言的总词汇量和自己咿呀学语时他家庭所接纳的他的词汇量之比。