儿童在能说或能听懂语言之前。
Long before children are able to speak or understand a language.
儿童在能说或能听懂语言之前，通过发出噪声来向父母表达意思。
Long before children are able to speak or understand a language, they still manage to express themselves to their parents by making noises.
儿童在能说或能听懂语言之前，很久就会通过面部表情和靠发出噪声来与人交流了。
Long before children are able to speak or understand a language, they communicate through facial expressions and by making noises.
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