锤炼的英文：
hammer-harden

Shaped by hammering with tools.Used chiefly of metals or metalwork.
锻造的用工具锤炼而成形的。常用于金属或金属制品

Work on your charm, considerateness for others and keeping your appearance in good shape.
锤炼你的魅力，对他人的体贴，并且保持良好的外在形象。

The workers have no guarantee that they can continue to ply their skills.
工人们得不到可以一直在一个工种中不断锤炼技术的保证。

Under the hammer
被拍卖

A crowd of reporters was hammering on the door.
一群记者正在砰砰地拍打着大门。

The anvil is not afraid of the hammer.
砧不畏锤。

Please hammer out these nails.
请把这些钉子敲掉。

He bruise his finger with a hammer.
他的手指被锤子击伤。

hardened and tempered
淬火与回火的

These are the seedlings that are hardening off in a hotbed
这些是放在温床中经受耐寒锻炼的幼苗。

There they cool and harden into volcanic ash.
然后在空中它们又冷却变成火山灰。

Hardening,as of tissue,by such impregnation.
硬化组织的硬化，通过如上的钙化作用

Sand was deposited which hardened into sandstone.
沙经沉积固结形成沙岩。