🧩 词语组成解析
light
[laɪt]
n. 光;发光体;电灯;点火器;
adj. 轻的;明亮的;浅色的;少量的;
v. 点燃;照亮;用光指引;
adv. 轻地，轻装地;
ballast
['bæləst]
n. 压舱物，压载物;道渣，碎石;镇流器;<比喻>沉着;
vt. 给某物装上压舱物;给…铺道渣;使稳定;使沉着;
🗣️ 情景例句
Thank you.
谢谢。
Would you open the door for me, please?
你能替我开门吗？
It was the idea of supporting a craft on a 'pad',or cushion, of low-pressure air, ringed with a curtain of higher pressure air.
用一个气垫来支撑船体，低压空或软垫，软垫周围用高压空气环绕。