Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
He is not up to the job.
他不能胜任这个工作。
I must admit I had my doubts.
我必须承认我当初是我疑虑的。
Insuring public or private property is a standard practice in most countries in the world.
承办公共财产或私人财产保险是世界上大部分国家的正常业务。