危急;程度深serious

• 严重问题

  serious problem

• 严重关头

  critical juncture

• 局势严重

  the situation is grave

• 病况严重

  the patient's condition is critical

• 越来越严重

  more and more serious

• 严重的后果

  serious consequences

• 严重的罪行

  serious crime

• 严重的损失

  serious loss

• 严重的灾害

  serious disaster

• 严重的威胁

  serious threat

• 予以严重注意

  give serious notice

• 提出严重抗议

  lodge a solemn protest