First ringing
un. 初呼振铃
🧩 词语组成解析
first
[fɝst]
n. 第一，最初;头等;一号，;[乐]高音部;
adv. 最早，最初;首次;宁愿;优先;
adj. 第一流的;最初的，最早的;基本的，概要的;高音的;
num. 第一;
a. 响亮的, 明白的, 清脆的, 干脆的\\n[电] 振铃
🗣️ 情景例句
I'm so busy that I don't get around to it.
我忙得找不出时间去做它。
I'm going to show him how to speak Chinese.
我正要指点他如何讲中国话。
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。