Hold open an XMLHttpRequest connection until a response is received.

保持打开XMLHttpRequest连接，直到收到响应。

youdao

Hold the door open.

让门开着。

youdao

Hold an open book in your hands in front of you and close it quickly. What can you feel?

手中拿一本展开的书放在面前，快速合上书，你能感觉到什么？

youdao

Both stents are used to hold open arteries after they have been unclogged using a balloon, a procedure known as angioplasty.

FORBES: Studies Give Edge To J&J Stent

Stents are tiny metal mesh tubes designed to hold open clogged arteries, and they have revolutionized cardiac treatment within the last decade.

FORBES: A Big Win For Johnson & Johnson

Another benefit: The doors can improve the efficiency of trains because they make it more difficult for passengers to hold open train doors.

WSJ: Subway-Push Prevention Solution Would Be Very Costly for the MTA