1 Subjects: “...cycling of atmospheric mercury...”

2 Subjects: “...regional/global water cycle...”

3 Subjects: “...political budget cycles...”

4 Subjects: “...cycling...”

5 Subjects: “...life-cycle...”

6 Subjects: “...hydrologic cycle...”

7 Subjects: “...cycling...”

8 Subjects: “...life cycle assessment...”

9 Subjects: “...life-cycle analysis...”

10 Subjects: “...life cycle...”

11 Subjects: “...life cycle assessment...”

12 Subjects: “...Krebs cycle design...”

13 Subjects: “...Krebs cycle design...”

14 Subjects: “...life cycle...”

15 Subjects: “...gait cycle...”

16 Subjects: “...gait cycle...”

17 Subjects: “...gait cycle...”

18 “... purification and retention, nutrient and matter cycling, and soils habitat functions are essential...”

19 “... technologies, implementation of life cycle analysis, upgradation and optimization of the entire production line...”

20 “... that constantly interact with each other within the Earth's hydrologic cycle. Many studies utilized observations...”