When European explorers and travelers spread out, that they had become essentially immune to, that they had learned how to tolerate over hundreds and hundreds of years, thousands of years, of living with domesticated animals who were the sources of those pathogens.
ヨーロッパの探検家と旅行者が拡散したとき 彼らは 彼ら自身には免疫がある 細菌を運んで行きました 彼らは 何百年 何千年に亘って 病原菌の源である 家畜と一緒に住むことにで 免疫を養ってきたのです