syncope

例句：

1. 1.She suddenly collapsed on the floor.
   她突然倒在地上。
2. 2.He fainted from exhaustion after a long day's work.
   他在长时间工作后因劳累而昏倒。
3. 3. The doctor said she had a fainting spell.
   医生说她有一次短暂的昏厥。