Certify to
v. 书面证明
🧩 词语组成解析
to
[tu,tə]
prep. 向，朝着;到;关于;属于;
adv. 朝一个方向的;到某种状态;关闭;
🗣️ 情景例句
Workers have to work very hard to keep bread on the table.
工人得十分努力工作才能赚钱糊口。
Where the sun enterd, the doctor does not.
阳光照耀处，医生就不需。
Take it easy!
别着急！