topic-comment'tɔpik'kɔmentBNC¹⁷³⁹⁹⁵⁺² 基本例句 主述¹⁰⁰ Considering all these differences in sentence structure, translators find switching subject-predicate into topic-comment sentences is often necessary but difficult in English-Chinese translation. 由于英汉语在句子结构上的巨大差异,英汉翻译中,句式转换通常是必要的但也是十分困难的一个环节。 fabiao