🧩 词语组成解析
hickory
[['hikəri]]
n. 山核桃树, 山核桃木\\n[医] 毡毛山核桃
pine
[pain]
n. 松树;松木;凤梨，菠萝;
vi. 憔悴;痛苦;渴望;
vt. 为…悲哀;哀悼;消瘦;渴望，渴慕;
adj. 似松的;松木的;
🗣️ 情景例句
How much do stamps cost?
邮票多少钱？
What are you speaking about?
你正在谈什么？
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）