说明生理负荷强度适宜，对增进学生健康有积极的意义，特别对心肌泵血机能的锻炼有积极作用，能收到健身效果。
These show the physiology load intensity is fitting, and that can promote student's health, especially to the student's myocardial function.
驾驶拖拉机作业时，驾驶员的作业强度与生理负荷随着拖拉机的转向机构的不同而有较大的差别。
When driving a tractor in the field, the operating strength and the physiological load of an operator differ greatly from the steering mechanisms.
驾驶拖拉机作业时，驾驶员的作业强度与生理负荷随着拖拉机的转向机构的不同而有较大的差别。
When driving a tractor in the field, the operating strength and the physiological load of an operator differ greatly from the steering mechanisms.
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