| 1. | Water is one of the materials required to sustain life .
水是维持生命所必需的物质之一。 |
| 2. | Sicker and older patients are kept alive by respirators, heart pacers .
一部分重症和老年患者靠人工呼吸器，起博器等维持生命。 |
| 3. | Each of these life-sustaining agents begins as a stem cell, a sort of hematological embryo .
这三种维持生命的要素都起源于干细胞。干细胞是血液的胚胎。 |
| 4. | The hydrogen bonding that takes place between water molecules accounts for some of the remarkable and vital properties of water .
水分子之间的氢键解释了水的某些特具的和维持生命所必需的性质。 |
| 5. | Energy is transferred from the electron donor to the organism for synthesis and maintenance by a complex series of enzymatic reactions .
为了细胞合成和维持生命，能量从电子给予体通过一系列复杂的酶反应转移到生物体。 |
| 6. | Some animals live on all kinds of food
（有些动物可以吃各种食物来维持生命。 ） |
| 7. | ( man 4 ) they seem to survive by eating human flesh
他们似乎靠吃人肉维持生命 |
| 8. | She hardly eat enough to keep body and soul together
她没有足够的食物来维持生命。 |
| 9. | Water is of vital necessity in the desert
在沙漠地区水是维持生命的必需品。 |
| 10. | Man 4 ) they seem to survive by eating human flesh
他们似乎靠吃人肉维持生命 |
