1、Oestrogen helps to keep open the artery carrying oxygen-rich blood to the foetus.
雌激素可使動脈血管擴張，含氧量高的血液得以流向胎兒。

2、More and more shops on the main street downtown keep open beyond midnight.
市中心主要街道上越來越多的商店營業(yè)到半夜以后。

3、We keep open house at weekends.
周末我們隨時歡迎客人光臨。

4、AARs help us keep open a steady dialogue about learning and improvement.
AAR活動能夠幫助我們在不斷學(xué)習(xí)和持續(xù)改進方面保持開放式的對話。

5、The shops in central London keep open late on Thursday evenings.
倫敦市中心的商店星期四晚上營業(yè)到很晚。

6、They keep open departments in some subjects—science, engineering—that are shunned by locals.
這些錢使大學(xué)的某些系的課程得以繼續(xù)開設(shè)（如）科學(xué)系與工程系——這些不被當?shù)貙W(xué)生問津的課程。

7、At this time of the year our shops keep open to all sorts of hours.
每年這個時候，我們的商店任何時候都營業(yè)。

8、The shops in central London keep open late on Tuesday evenings.
倫敦中心的商店星期二晚上一直營業(yè)到很晚的時候。

9、As he thus sat, his eyes would keep open no longer, and he felt a desire to sleep.
當他坐著的嘶吼，他的眼睛再也睜不開了，他想睡覺。