🧩 词语组成解析
pin
[pin]
n. 钉;别针，扣针，饰针;大头针;没价值的东西;
vt. 压住;（用钉等）钉住，钉住，别住，扣住;用障壁等)围住，关住（俚语）抓住;[军]牵制;
adj. 针的;钉的;销的;大头针的;
grass
[ɡræs]
n. 草，青草;草地，草坪;告密者;〈俚〉龙须菜;
vt. 用草覆盖;使…长满草;使…吃草;
vi. 渐渐被草覆盖;放牧;
🗣️ 情景例句
Yes. It's the anniversary of one of our important revolutionary movements.
是的。它是中国一个重大革命运动的纪念日。
This week he took his first vacation from work in five years.
五年来，他本周破例第一次休假。
'You'll have to get off here,' the conductor said.
“您得在这里下车，”售票员说，