down on the nail 同义词
1 立即
present immediate instant slap-bang foothot away instantly thereon straightway subito immediateness at lightning speed with lightning speed at a clap at one clap at a word at one word on the instant without a moment's thought at a moment's notice in less than no time in half a second lose no time on the nail in tracks right now in a minute in an instant in a flash then and there off the bat there and then the next moment