英文: harden police administration;
中文: 加大公安机关的管理力度;英文: HARDEN OF CARBIDE TOOL
中文: 硬质合金刀具的强化英文: Hot steel is quenched to harden it.
中文: 烧热的钢淬火使它坚硬。英文: The varnish takes a few minutes to harden .
中文: 清漆几分钟就能变硬.英文: The varnish takes a few minutes to harden.
中文: 清漆几分钟就能变硬.