box counterweight 中文意思是什麼
box counterweight
解釋
箱式對重- box : n 1 箱，櫃，匣，盒；罩殼；錢櫃；〈美口〉保險箱；郵箱，信箱；〈英國〉禮盒；禮物（旅行用）衣箱。2 ...
- counterweight : n. 平衡重量；砝碼；抗衡。vt. ＝counterweigh.
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The " box " is a counterweight, used to keep the bridge open when boats are trying to go across it
這個」箱子」是有秤錘的作用，當船要經過時，能保持橋梁的張開
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