略知一二: have a smattering of; have a rough idea; know a little; know just a little; know sth. about; understand a little about ..
有所: to some extent; somewhat 短语和例子有所反复 oscillate; 有所改善 better; 有所借鉴 have certain experience to draw on; 有所偏好 loves it specially; 有所企图 have an axe to grind; 有所追求 be after sth.; 有所遵循 have sth. t