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- Harden up a little, we need more speed. 把帆索拉紧一点，我们需要加快速度。
- Hot steel is quenched to harden it. 烧热的钢淬火使它坚硬。
- The varnish takes a few minutes to harden. 清漆几分钟就能变硬。
- Don't harden your heart against him. 别对他硬心肠。
- So we find that hardening operation is made up of heating and quenching. 因此我们发现淬火工序包括加热和淬硬两个步骤。
- Please harden in the main ropes, the sail's not tight enough! 请把主要的绳索拉紧些，帆扯得不够紧！
- Anneal means make harden steel soft and remove brittleness. 退火就是使淬火钢变软并消除其脆性。
- Able to set and harden under water, as Portland cement. 在水中变硬的能在水下定型并变硬的，如波特兰水泥
- He often went to the gym to harden his muscles. 他过去常到健身房锻炼肌肉。
- They harden clay by putting it in a fire. 他们把粘土坯放在炉火里使其变硬。
- They let the liquid harden on a glass surface. 并让液体在玻璃表面硬化，
- The bylaws forbid play ball in the public harden. 地方法规规定任何人不得在公园打球或踢球。
- They harden clay by putting it in a fire . 他们把粘土坯放在炉火里使其变硬。
- Three. They are hardening, temper and anneal. 三种。它们是淬火、回火和退火。
- Three:they are hardening,temper and anneal. 三个过程：它们是淬火、回火和退火。
- Why shall harden steel be annealed? 淬火钢为什么要退火呢?
- Why shall harden steel be annealed ? 淬火钢为什么要退火呢?
- There they cool and harden into volcanic ash. 然后在空中它们又冷却变成火山灰。
- The tender-minded must harden themselves. 性格脆弱的人必须使自己坚强起来。
- To harden(a metallic surface)by rapid cooling. 冷铸，冷淬通过急冷处理使（金属表面）变硬
