Tdr
[计] 时间域反射仪
🗣️ 情景例句
This the rich part of town.
这里是小镇的富人区。
She fears Tom will drop out of school.
她担心汤姆会休学。
Frank gently lifted the crockery out of the box an suddenly noticed a miniature painting at the bottom of the packing case.
弗兰克轻轻地把陶器拿出箱子，突然发现在箱底有一幅微型画，