🧩 词语组成解析
river
['rivə]
n. 河，江;溪，巨流;
boulder
['bəuldə]
n. 卵石，圆石;巨砾，冰砾;漂砾;
🗣️ 情景例句
Yes,
是的，
I eat dinner at about 7 o'clock.
我在大约7点钟吃晚饭。
An electric razor that meets the European Union's safety standards must be approved by American testers before it can be sold in the United States,
一把符合欧洲联盟安全标准的电动剃须刀必须得到美国检测人员的认可，方可在美国市场上销售；