Grecc
abbr. Geriatric Research; Education; and Clinical Center (Seattle) 老年医学研究; GRIN rod external coupled cavity (laser) 缓变折射率棒状外耦合腔（激光器）
🗣️ 情景例句
worrying about him.
为他操心。
Tall trees catch much wind.
树大招风。
Do you go to work by bike?
你骑自行车上班吗？