the choice of flow direceionthe choice of flow direction流向: flow direction选择: pick and choose; select单向选择器: uniselector方向选择: direction select方向选择性: direction selectivity; directional selectivity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:流向选择，即可在微信中查询翻译
