Fastnesses
n. 牢固( fastness的复数形式 ); 固定; 要塞; 堡垒
🗣️ 情景例句
because she's had to go to Chicago on a business trip and can't leave till tonight.
因为她得到芝加哥出差，而且要到今晚才能脱身。
Could you carry my doggie for me?
你能替我带我的小狗吗？
The slope averages about 1 in 30, but contains steep,
坡度平均约为1/30，但其中包括陡峭的，