Trackshoe
轨道制动块
🗣️ 情景例句
If you fail this test you'll be kicked out of school.
你这次考试要是不过就得离校。
We pitied the family in their sudden unhappiness.
那家人遭受突然的不幸，我们深感同情。
The are no batteries in the radio.
收音机里没电池。