Now, we're doing something new making skin strong enough that it doesn't wrinkle, become dry, or develop blemishes.
现在我们正在做一些改进,使皮质变得坚韧而不致有皱纹,变干或产生磨损。
Because of this, we kept looking back, wondering if we were leaving a trail of oil and petrol behind us.
因此,我们不时地掉过头,怀疑车后是否留下了机油和汽油的痕迹。