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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。
- catalytic hardener 催化硬化剂
- Don't harden your heart against him. 别对他硬心肠。
- 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
- It is known as catalytic cracking. 这就是所谓的催化裂化。
- 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，
- Something called a 'hardener alloy'is made. 制出一种叫做“中间合金”的东西。
- 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。
- Why shall harden steel be annealed? 淬火钢为什么要退火呢?
- Mix base with thinner first, then add hardener. 先将主剂与稀释剂混合,再加入固化剂。
- Many other important catalytic parameters were deduced. 可以推导出很多其它重要的催化参数。
- Why shall harden steel be annealed ? 淬火钢为什么要退火呢?
- The dimethylbenzenes are obtained from catalytic reformate. 二甲苯可从催化重整得到。
