基本解釋天然後天免疫英漢例句雙語例句Objective:To compare the functions of natural immunity and acquired immunity in patients with primary gallbladder carcinoma (PGC) before operation after operation.目的：探討原發(fā)性膽囊癌患者手術前後機躰自然免疫防禦機能和後天獲得性免疫機能的對比結果。But knowing how much natural immunity has been acquired through infection is more difficult, especially given the very mild nature of illness in the vast majority of patients.但很難說清因感染獲得了何種程度的天然免疫力，尤其是因爲在絕大多數患者身上，疾病的性質非常溫和。natural acquired immunity更多例句專業(yè)釋義生物學天然獲得性免疫天然獲得免疫