First, don't tie your shoes too closely.

首先，不要把你的鞋带系得太紧。

youdao

Tie your shoes, please.

请系好鞋带。

youdao

You don't know how to tie your shoes?

你怎么了？你不知道怎么系鞋带？

youdao

Let's say your little brother is just learning how to tie his shoes.

假设你的弟弟正在学习怎么系鞋带。

Don't 课堂 - SpeakingMax英语口语达人

To use it you basically straddle a bicycle seat with robotic legs, tie it to your shoes, and then (gingerly) go about your business, uncomfortably demonstrated in a video after the break.

ENGADGET: Honda introduces new walking assist machine, doubles as bionic wedgie maker