I don’t understand the meaning and using mathod.

Hell0o, Jessica!

Thank you for sending your homework.

Cheers!

Jean~~

You already know that I have studied speaking max, and I found that sentence.

>> You already know that I\'ve been learning spoken English for a long time, and that I encountered that sentence during my studies.

“City bike is service that lets you rent a bike for a certain number of half hours.”

>> \"City bike is a service that lets you rent a bike for a certain number of hours.\"

 Lets’ means that do somthing else.

>> \"Lets\" means, it allows you.

 I supposed that” let you know” ‘s meaning like tell you .

>> I supposed that \"let you know\" means, to tell you.

 It also mean that city bike is service that I’ll lent you for certain duration ISupposed.

>> It also means that a city bike is a service that will lend you the bike for a certain duration.

Idon’t know certain meaning and I curious use that meanig,too.

>> I don\'t know the meaning of some words and I want to know how to use them.