易发生复杂情况的层带的英文

troublesome zone

• 易:    easy
• 发生:    happen; occur; tak ...
• 复杂:    complex; complicat ...
• 情况:    circumstances; sit ...
• 的:    4次方是 The fourth po ...
• 层:    I storey; tier; st ...
• 带:    belt; girdle; ribb ...