...you give your opinion on them. These are some of the ways...
adraw your family tree and show it to your class 画您的家谱并且显示它对您的类[translate] ahas an incentive to 有一个刺激[translate] aIt may depends on the sampling. It costs only 15-20 bucks. 它可以取决于采样。 它只花费15-20个大型装配架。[translate] ...