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安裝中文字典英文字典辭典工具!
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- BALLAST Definition Meaning - Merriam-Webster
The meaning of BALLAST is a heavy substance (such as rocks or water) placed in such a way as to improve stability and control (as of the draft of a ship or the buoyancy of a balloon or submarine) How to use ballast in a sentence
- 111. What Exactly Is a Ballast and Why Does It Matter?
The ballast restricts the voltage to a safe level, so the gas inside the discharge lamps (like fluorescent or HID lamps) ignites, producing light Depending on the type of ballast, this process can happen quickly or more gradually For example, rapid start ballasts preheat the lamp’s cathodes before allowing the current to flow fully
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