If that requirement seems demanding, Shakespeare's sonnets are also written in iambic pentameter.

VOA: special.2010.01.06

You will have sonnets and little bits of prose.

包括十四行诗和少量的散文。

耶鲁公开课 - 弥尔顿课程节选

Even with these restrictive rules, the sonnets seem effortless.

VOA: special.2010.01.06