Tetrahydropteridine
[化] 四氢蝶啶
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
How long will it take for a package to get to California?
你把包裹寄到加州要多长时间?
Here is another photograph.
这是另一张照片。