🗣️ 情景例句
San Francisco General Hospital.
这里是旧金山总医院。
To send mail(a letter)
邮寄邮件
Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
如果有相配的电压，可以煮少量水的便携式热水装置是有用的。