Dense phase voidage can be estimated by cutting gas flow and following the rate of bedcollapse.
采用切断流化床气源,并跟踪测量床面塌落速度的方法,可以测得浓相空隙率。
2
A few days after his collapse he was sitting up in bed.
他病倒后过了几天就在床上起身坐着了。
《柯林斯英汉双解大词典》
3
Do you find yourself so tired from taking care of a house full of kids and your elderly parent or disabled spouse that you collapse into bed exhausted at the end of the day?