steel

钢, 钢制品, 钢铁, 坚硬, 坚固

an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range; knife sharpener consisting of a ridged steel rod

钢的, 钢制的, 钢铁业的, 坚强的

使坚强, 钢化, 使冷酷

get ready for something difficult or unpleasant; cover, plate, or edge with steel