当在英语环境中遇到紧急情况时，保持冷静并尝试使用简单的英语表达您的需求。

以下是一些常用的紧急情况下用英语求助的句子：

1. Help! (救命！)

2. Please help me! (请帮帮我！)

3. Is there anyone who can help me? (有人能帮助我吗？)

4. Can you please call the police/ambulance/fire department? (你能打电话报警/叫救护车/通知消防队吗？)

5. I need medical assistance/first aid. (我需要医疗救助/急救。)

6. Can you show me the nearest hospital/police station? (你能告诉我最近的医院/警察局在哪里吗？)7. I'm lost. Can you help me find my way? (我迷路了。你能帮我找到路吗？)8. Can you speak more slowly/clearly, please? (请你说话慢一点/清楚一点可以吗？)9. I don't understand. Can you explain it again? (我不明白。你能再解释一遍吗？)记住，保持冷静并尽量清楚地表达你的需求是非常重要的。