Usage and Meaning
"密封" (mìfēng) primarily means "to seal tightly" or "to close something so that nothing can get in or out." It is commonly used for containers, letters, or packages to indicate that they are closed securely.
Common Contexts
You will often see "密封" used with bottles, envelopes, or bags to emphasize airtight or tamper-proof sealing. For example, "密封瓶" (sealed bottle) or "密封袋" (sealed bag).
Collocations and Patterns
- 密封瓶: sealed bottle, used to keep contents fresh or uncontaminated.
- 密封信封: sealed envelope, often to ensure privacy or security.
- 密封包装: sealed packaging, common in food or product preservation.
Nuances
Using "密封" implies a strong, airtight closure, often to protect contents from air, moisture, or tampering. It differs from simply "关闭" (to close) by emphasizing the tightness and security of the seal.
Common Confusion
Do not confuse "密封" with "封闭" which means to close off or block an area. "密封" focuses on sealing an object or container, while "封闭" often refers to closing a space or restricting access.