Continue to locomote using your heels only for two minutes.

坚持用你的脚跟行走2分钟。

Since plants cannot locomote, the sensation of experiencing pain would be superfluous. Thus, plants differ completely physiologically from mammals.

由于植物无法移动，它们不太需要具备感知痛苦的能力，因此，植物与哺乳动物在生理上全然不同。