Crookes's tube
[医] 克鲁克斯氏管(X线真空管)
🧩 词语组成解析
🗣️ 情景例句
She's a smart young lady, and very nice.
她是个聪明的年轻姑娘 而且很善良。
Do you usually do arithmetic on Sunday?
你通常在星期日做算术吗？
We have our evening meal at about a quarter past six.
我们6：15分左右吃晚饭。