speculate on a fall做: make; manufacture; produce空头: bear; short-seller; oversold ...投机: speculate; seize a chance to ...空头投机: bear speculation抛售, 做空头: sell for a fall下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:做空头投机,即可在微信中查询翻译