It lets some of the built up humidity escape and allows an exchange of stale inside air for air from the fresh outdoors.
这样做可以使潮湿的、废旧的空气逸散，同时保持室内空气清新。
2
Make certain the holes are large, but not large enough to let any predator inside! This helps to keep humidity up, keeps rodents and other pests out, and allows for good oxygen exchange.
With time series simulation software, the CPU's I/O ports simulate I2C bus and exchange data with clock chips, temperature humidity sensors, memory chips and other devices.