are designed to|is designed to

这些措施旨在减少污染。

These measures ___are ___designed ___to reduce pollution.

会议结束时的派对旨在让人们粗略了解许多不同的文化。

The end-of-conference party ___is ___designed ___to give rough ideas about many different cultures.

一些监测设备旨在警告人们某些危重疾病。

Some monitoring devices ___are ___designed ___to warn people of certain critical illnesses.