Signal's
来自Big Physics
late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum ‘mark, token’ (see sign). The verb dates from the early 19th century.
late Middle English: from Old French, from medieval Latin signale, neuter of late Latin signalis, from Latin signum ‘mark, token’ (see sign). The verb dates from the early 19th century.