Definition: to start to happen or work Level: C1
供暖系统在早上六点自动启动。
The heating ___comes ___on automatically at six in the morning.
她在会议期间感到偏头痛要发作了。
She felt a migraine ___coming ___on during the meeting.
如果你感觉有感染要发作，请立即咨询医生。
If you sense an infection ___coming ___on, consult a doctor promptly.
