The sands of time are running out for the central star of this hourglass-shaped planetary nebula. 在这一酷似沙漏形状的星云内,“时间之沙”即将从中央星之中流逝殆尽。
Venomous New World spider; the female is black with an hourglass-shaped red mark on the underside of the abdomen. 西半球有毒的蜘蛛;雌体为黑色且腹部下方有沙漏状的红色斑点。
Hourglass-shaped X-ray compound refractive lens made by back-mask exposure technology 背面曝光技术制作沙漏状X射线组合折射透镜
The cerebral scion approximated the appearance of the Regent's living computer, and floated in a tall, clear fluid bubble chamber that was set into an hourglass-shaped base. 这个大脑的增殖体样子非常接近原始生物电脑,也悬浮在一个高大的充满清澈液体的泡沫室中,整个泡沫室安装在一个沙漏形状的底座上。
The corrosion tests were carried out at stress controlled using hourglass-shaped specimens. 使用漏斗型试样进行应力控制下的疲劳试验。