The teaspoon could be confined to the back of the cutlery drawer following the invention of a self-stirring teacup created by two French designers and displayed at the London Design Festival recently.
近日在英国伦敦设计节上，由两名法国设计师发明的自动搅拌杯倍受关注。
2
Strictly speaking, his invention is not so much self-erasing ink as self-erasing paper.
严格来说，Grzybowski博士的发明与其说是可以隐形的墨水，不如说是自动清除字迹的纸张。
3
Meanwhile, city is also a human invention which destroys the natural self-renewal system.