Boundary-stone
界石
🧩 词语组成解析
stone
[ston]
n. 石头;宝石;矿石;（膀胱或肾脏中的）结石;
vt. 向扔石块;用石头铺;以石掷向;除（水果的）硬核;
adj. 石制的;石头似的;[S-]石器时代的;粗陶制的;
adv. 石一般的;
🗣️ 情景例句
Tomorrow morning it is.
确定是明天早晨。
So he keeps on studying after his English classes in order to prepare for life in America.
所以他在英语课下课后还继续学习，为以后在美国生活做准备。
People change, but they don't suddenly chnge from being right-handed to being left-handed.
人会变，但他们不会从惯用右手而突然转变成左撇子的。