用法:
1 drug having a depressant effect, esp a barbiturate 抑制药, 镇静药（尤指巴比妥类）. Cf 参看 upper n 2.

用法:
2 depressing experience, person, etc 令人沮丧的经历、 人等:
What a downer that guy is! 那家伙多让人泄气呀!

• telephone directory (also `telephone book, `phonebook)
• telephone exchange (also exchange)
• telephone number (also `phone number)
• telephone operator
• telephonic
• telephonist
• telephony
• telephoto
• telephotographic
• telephotography
• telephoto lens
• teleprinter
• teleprompter
• telescope 1
• telescopic
• telescopically
• teletext
• teletypewriter
• televise
• television
• telex 1
• tell
• teller
• telling
• tellingly