1·The pericardium consists of two distinct sublayers: the sturdy outer fibrous pericardium and the inner serous pericardium.
心包由两个不同的亚层组成：坚固的外纤维心包和内浆液心包。
2·These principles are compatible with the hard work of building structures and institutions that are sturdy enough to weather the storms ahead.
这些原则与建立机构和事业机构的辛苦工作是协调的，这些机构足够坚固可以挨过暴风雨。
3·Stainless steel rebars, the sturdy rods that reinforce concrete in all kinds of construction, are now no longer made in America.
不锈钢钢筋，在各种建筑中加固混凝土的坚固的棒，现在也不再在美国生产。
4·Its body flips and spins, guarding itself with its altogether more sturdy metal casing.
它不断翻动和旋转，用更坚固的金属外壳保护自己。
5·He imagined building a boat of his own, something simple but sturdy that could at the very least make its way across the gulf to Saudi Arabia.
他想象着造一条自己的小船，简单而坚固的那种，起码要能度过沙特阿拉伯海峡。