n. an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range
n. knife sharpener consisting of a ridged steel rod
v. get ready for something difficult or unpleasant
v. cover, plate, or edge with steel
n. 钢, 钢制品, 钢铁, 坚硬, 坚固
a. 钢的, 钢制的, 钢铁业的, 坚强的
vt. 使坚强, 钢化, 使冷酷