constantly
adv. 总是，经常地，不断地
例句
Planes flew overhead constantly.
飞机不断从头顶上飞过。
《牛津词典》
A nurse attended to his needs constantly.
有一位护士经常照料他的需要。
Surgical techniques are constantly being refined.
外科手术技术正在不断得到完善。
《柯林斯英汉双解大词典》
