Have a habit of dropping books in the bath? All you need is a retractable dog's leash.
浴缸里看书的时候书老是掉？你只要一根可伸缩的牵狗绳就可以。
2
Drop hardening: the process of dropping small cups and cones and all rollers directly from the drop hardening furnace into an oil bath which quenches them.