变小

The margin of safety has grown thin.

安全系数已变小了。

The innovation of air travel during this century has made the world seem smaller.

本世纪发明的空中飞行似乎使世界变小了。

Heat treated boards display a reduced modulus of rupture and an increase in dustiness.

经过热处理后，板材的断裂模数变小，而含尘量增加。

Their voices fell.

他们的声音变小了。

"But when industry became more important than agriculture in American life, families became smaller."

"但是,在美国人的生活中当工业比农业更为重要时,家庭开始变小了。"

The results showed that a mixed mating system was possibly the main heterogamy of this species, and its endangerment was caused by over-exploitation and habitat loss.

导荷叶铁线蕨濒危的主要原因是生境的破坏以及过度开采所导的生境片断化使其居群变小、近交率加大、遗传变异趋低，降低了其生存以及进化的潜力。

The analyses of energy band structure indicates:this series of molecues have high intrinsical conductivity, the energy gaps will become smaller, intrinsical conductivities increase when the quasi-o...

能带结构分析表明：该类分子具有较好的本征电导率，分子的体系向二拓宽，将使能隙趋于变小，本征电导率增加，此与裂解温度高则聚合度和电导率相应增加的实验结果。