Hematoporphyrin
血卟啉
🗣️ 情景例句
I have received the secretarial training for six months.
我曾接受过6个月的秘书训练。
I heard the clock, but I didn't get up until 9.
我听见闹钟了，但我捱到九点才起。
English is spoken as a first language by most people in the USA, Great Britain, Canada, Australia and New Zealand.
在美国、英国、加拿大、澳大利亚和新西兰，大多数人都把英语做为第一语言。