contracting

The exercise consists of stretching and contracting the leg muscles.

此项训练包括伸展和收缩腿部肌肉。

In this exercise, the muscles are elongating rather than contracting.

在这项运动中，肌肉是在延伸而不是在收缩。

He developed full-blown AIDS five years after contracting HIV.

他感染艾滋病病毒五年以后，患上了完全型艾滋病。

If the population of these other species were increased, the number of ticks acquiring the bacterium and hence the number of people contracting Lyme disease would likely decline.

如果这些其他物种的种群数量增加，蜱类捕获细菌的数量就会减少，因此感染莱姆病的人数就会减少。

Upon contracting government projects, the antecedent money for bidding may be reduced by up to 50%.

承揽政府工程时，押标金、得降低百分之五十以下。