Under ordinary circumstances the vitamin c in the human body comes from the food . 一般来说人体的维生素C是来源于食物的。
Then began this business of deliberate food-growing and of food preservation . 然后开始这种有意识地种植粮食和储存食物的活动。
Physiologists so far have shown that six of them are affected by eating certain foods . 生理学家至今已经发现，其中六种是受着摄入某些食物的影响。
His total heat output was measured and compared with the calorific content of the food he ate . 量出他的总热量输出，并与他吃进去的食物的含热量作了比较。
Animal products add flavor and variety to diet and thereby contribute to psychological well-being . 畜禽产品丰富了食物的风味和品种，对于心理健康也起一定的作用。
In this regard it is important to remember that biophages do affect the rate of production of their food . 在这一点上，要记住生物噬食者是影响它们食物的生产速率的。
The wall of the esophagus also contains glands that secrete mucin and thus lubricate the passage of food . 食物的壁也含有腺体，这些腺体分泌粘蛋白，以之来润滑食物的通道。
I say that the power of population is indefinitely greater than the power in the earth to produce subsistence for man . 我认为，人口的力量显然大于地球为人类生产食物的力量。
At that moment, josieshort and sturdy, her dark features beamingmarched in with a loaded tray . 那时乔西她身材矮小而壮实，黑色脸庞堆满了笑容大步走了进来，手里捧着一个盛满食物的托盘。
Without obtaining an absolute control over both the variety and amount of food, they could not have multiplied into populous nations . 假如他们对食物的品种和数量不能绝对掌握，就不能繁衍为许多人口稠密的民族。
