Bone density contributes to the strength of the bones; and their density changes in response to body weight and to weight-bearing exercise.

骨密度代表骨的强度，骨密度依随体重和负重锻炼而相应升降变化。

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The density changes very little after soaking when the compactness of aeolian sand is above 90%.

风积沙的压实度达90%以上时，浸水所造成的密度改变很小。

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OBJECTIVE: To evaluate the bone density changes in the healing process of tibial plateau fractures in rabbits.

目的：观察胫骨平台骨折愈合过程中的骨密度变化情况。

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Each car starts with a certain position and speed, and the road thus has a particular density of cars that changes as they move along, and as new cars are injected from a junction slip-road.

ECONOMIST: Traffic management: Desynchronised | The

It's an airtight pod that changes air pressure, temperature and density.

WSJ: One Kid's Personal Tennis Academy

Double your vegetable intake and reduce fat -- Both of these changes will significantly decrease the calorie density of your diet without decreasing the volume of food that you consume.

CNN: How can I maintain my energy level for sports while on a diet?