Sema
abbr. 美国汽车改装用品协会（the Specialty Equipment Market Association）
🗣️ 情景例句
You just relax with Grandpa.
你只要放轻 陪爷爷就行了。
If they say you are good, ask yourself if it be ture.
若有人称赞你，要自问对不对。
What was the population of the world in 1950?
1950年世界人口是多少？