Aetiologist
n. 病因学家；病原学家；原因论学家 (aetiology的变形)
🗣️ 情景例句
You don't need to do that, Grandpa.
你不用这样，爷爷。
I answer telephones and do some typing.
我接电话和打字。
but at this age the likelihood of death is least.
但在这个年龄死亡的可能性最小。