keep on是什么意思

　　The ECB also pledged to keep on supporting the markets.

　　歐洲央行還承諾繼續支持市場。

　　And they will keep on visiting it and linking to it.

　　而且他們會一直訪問并鏈接它。

　　But for lunar scientists, they're gifts that keep on giving.

　　但對月球科學家而言，此次登月一直不斷地帶給他們新的研究成果。