Nondetectable
不能检测的
🗣️ 情景例句
He cancelled his appointment.
他取消约会了。
Touch pitch and you will be defiled.
近朱者赤，近墨者黑。
The nomads who made these markings lived by hunting and fishing during the last Ice Age which began about 35,000 B.C.and ended about 10,000 B.C.
这些痕迹是游牧人留下的，他们生活在从公元前约35，000年到公元前10，000年的冰川期的末期，以狩猎、捕鱼为生。