"a precarious truce"
"a parlous journey on stormy seas"
"a perilous voyage across the Atlantic in a small boat"
"the precarious life of an undersea diver"
"dangerous surgery followed by a touch-and-go recovery"
"a shaky marriage"
Though the tenure is precarious, I cannot help liking the situation for you.
出自： Horace Walpole
She would lose her husband, the chief prop of her precarious happiness.
出自： Anne Stevenson