async *transform(source) {
Visitors to select Lego Stores on March 7 (from 10 a.m. to 12 p.m. GMT) and March 8 (from 12-2 p.m. GMT) can participate in an awesome Lego Star Wars Lightsaber make and take event. This free giveaway is intended for children aged 10+, and the model is available on a first-come-first-serve basis, at participating locations in the UK, while supplies last. Will we see similar events scheduled for the U.S.? That's down to the Will of the Force.，这一点在雷电模拟器官方版本下载中也有详细论述
// Share with explicit buffer management，更多细节参见51吃瓜
arr[i] = rand() % (max - min + 1) + min;