Upgradable
a. 能提到更高一级标准的(=upgradeable)
🗣️ 情景例句
When you have a business meeting in the United States, come to the appointment on time.
当你在美国有商务会晤时，一定要按时赴约。
Score twice before you cut once.
三思而行。
Two years later, her father disappeared, never to be heard from again.
两年后，她父亲失踪了，从此再无音讯。