1. 威胁生命的：4. have already suffered已经承受 | 5. life-threatening威胁生命的 | 6. take on a range of functions起大量作用

2. 危害生命：life?supportsystem生命维持系统 | life?threatening危害生命 | life?world生活世界

3. 危及生命的：volunteer --- 志愿者, | life-threatening --- 危及生命的, | chief complaint --- 主诉,

4. 危急生命的：life-testrack 寿命测试台 | life-threatening 危急生命的 | life-timedilatation 使用寿命的延长

adj

1. causing fear or anxiety by threatening great harm

e.g. a dangerous operation
a grave situation
a grave illness
grievous bodily harm
a serious wound
a serious turn of events
a severe case of pneumonia
a life-threatening disease

Synonym: dangerousgravegrievousserioussevere