radiator cooling fin

例句：

1. 1.The car's radiator cooling fin is designed to keep the engine cool during high-speed driving.
   汽车的散热器散热鳍片设计成在高速行驶时保持发动机冷却。
2. 2. The engineer replaced the old radiator cooling fin with a new one, hoping to improve the car's performance.
   工程师用一个新的散热器散热鳍片替换了旧的，希望可以提高汽车的性能。
3. 3. During the summer, the radiator cooling fin becomes more important as it helps to dissipate heat from the engine.
   在夏天，散热器散热鳍片变得更为重要，因为它帮助从发动机中散发热量。