Coordinates of a single point are separated by commas and Spaces are used between points.
每个点的坐标以逗号隔开，点之间用空格隔开。
2
In real life, your development or test environment may point to the same database, but your production environment would certainly be separated from the development or test database.
在现实中，开发环境和测试环境可能指向同一个数据库，但是生产环境肯定应该与开发或测试数据库分开。
3
Join the flames together about a third of the way or midway from the base of the fire and have the flames separated going up from that point.