The microscope used in the study has a small tip on a spring to push against a cell's surface and determine its level of softness or firmness.
该研究所用的显微镜有一个弹簧尖端以推压细胞表面并决定其柔软度或硬度。
The middle part of the fruit surface was suggested to be used as the location of the force excitation while estimating the fruit firmness by the resonant frequency of the first-type mode.
当采用第一纵向振型的共振频率来估测水果硬度时，激励点应置于水果外表面的中部；
A heavy-duty foam layer helps absorb motion and shock from the sleep surface, enhancing firmness and durability.
重量级特制海绵层，有效吸收体重的冲击力及震荡，提升床垫的耐用度及承托力。
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