撇渣过频或操作不当会使浮渣损失很大。
Frequent skimming or improper skimming can cause a much higher dross loss.
洗车不宜过频，频繁洗车，会加速漆面氧化。
The car should not be too frequent, frequent washing will accelerate the oxidation of paint.
保持有效连接，经常用来避免过频反复连接网络服务器。
Keep-Alive connections are often used to avoid the overhead of repeatedly connecting to the web server.
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