大小单双长龙应该怎么跟

简介：The speaker was a lieutenant colonel officer with a beard on his face. This officer was of medium build, with a beard on his face. He had a pair of small triangular eyes with bright eyes that were exposed from time to time. He wore a pair of golden glasses on the bridge of his short nose. The silk-rimmed glasses make it difficult to imagine that this person is actually an expert in bacterial weapons.