Mother would accumulate the river sand into a large heap drying in the open and then riddlewith a screen before selling to the building boss.
母亲需要把捞上来的河沙堆积成一个巨大的沙丘,在空气中晾晒干后,用筛子再筛一次,然后才能卖给建筑商。
2
After tried to figure out this old riddlewith the help of the newest computer technic, the Bristain's scientists said the answer is most likely the chicken.