门栏的英文：
door bar
threshold

door是什么意思：
n. 门，门户；途径
  • The door was unclosed.
    门被人打开了。
  • This door is manual.
    这个门是要用手操作的。
  • Who is knocking the door || Who is knocking || Who is at the door || Who is knocking at the door?
    谁在敲门
bar是什么意思：
n. 条，棒，杆；栅栏；酒吧间
v. 闩上；阻挡；排斥
  • To exclude or shut out;bar.
    把…排除在外；把…排除在外，不予考虑
  • To exclude or rule out;bar.
    除去，排除；排斥
  • She is reading for the bar exam.
    她正在攻读律师专业。
threshold是什么意思：
n. 极限；临界值；门槛，入口；开始
  • The threshold of a physiological or psychological response.
    阈限生理或生理反映的下限
  • The threshold varies depending on your system.
    该阈值因系统而异。
  • We are on the threshold of a new era in astronomy.
    我们很快就将迎来天文学的新纪元。

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