13. GWD31-Q13 Dolphins lack vocal cords, nevertheless creating sounds: a complicated system of whistles, Squeaks, moans, trills, and clicks are produced by sphincter muscles inside the blowhole
1) nevertheless creating sounds: a complicated system of whistles, squeaks,
moans, trills, and clicks are produced by 2) nevertheless creating sounds: they produce a complicated system of whistles, squeaks, moans, trills, and clicks with 3)but they do create sounds, producing a complicated system of whistles, squeaks, moans, trills, and clicks with
4)but they do create sounds, a complicated system of whistles, squeaks, moans, trills, and clicks being produced
5)but nevertheless creating sounds: a complicated system of whistles, squeaks, moans, trills, and clicks produced by
they do create sounds 的語氣是較強烈。
By +n. 施动者。
BY用来描述一个行为的细节,比如I TOOK THE KNIFE BY TACKING ITS BLADE. WITH用来强调工具.比如I TOOK THE KNIFE WITH MY HAND. with修饰的是produce, with也有可能修饰它紧跟的词.解释前面的名词。
Unlike humans, dolphins lack vocal cords, but they do use a complicated system of whistles, squeaks, moans, trills and clicks produced by sphincter muscles within the blow hole. 分词短语无逻辑主语,又不是伴随结果。错。
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