What's clever here though is the poem is so close metrically to being iambic pentameter, five metric feet.

聪明之处在于每节有五行都使用了六音步抑扬格诗韵。

SVO languages usually have articles like " the" before the noun, giving it an iambic sound pattern.

SVO 语言通常在词前会有像“the”样冠词，使其具有抑扬格韵律。

For two things do my thoughts turn now and then to London. I should like to hear the long note of a master's violin, or the faultless cadence of an exquisite voice, and I should like to see pictures.

有两件事让不时想到。想听到大师小提琴悠长音符，或美妙声音完美无瑕抑扬顿挫，想看图画。