Go-ahead tone
[计] 先行音信号, 响导信号
🧩 词语组成解析
go
[go]
vi. 走;离开;去做;进行;
vt. 变得;发出…声音;成为;处于…状态;
n. 轮到的顺序;精力;干劲;尝试;
tone
[təun]
n. [语]声调，语调;[画]色调，色泽，明暗;[乐]乐音，全音，全音程;[医]（正常的）健康状态;
vt. 使更健壮;定调;使变调子;[摄影术]给…上色;
vi. 带有某种腔调;呈现某种色彩;（颜色）调和（与 with 连用）;
🗣️ 情景例句
Yes?
怎么？
When were you born?
你什么时候出生的？
From 1830 onwards in the USA and from about 1870 in Canada, settlers began to move westwards and to take possession of the plains as their own.
美国自1830年起，加拿大从1870年左右起，殖民者开始向西迁移，并把平原据为己有。