主意: plan, idea, decision...
强: strong; powerful; better...
普及: to spread extensively, to generalize, widespread, popular, universal, ubiquitous, pervasive...
课本: textbook...
护: to protect...
特定: special, specific, designated, particular...
牌: mahjong tile, playing card, game pieces, signboard, plate, tablet, medal...
码: a weight, number, yard, pile, stack...
