adj.无限的,无穷的,无边际的,广阔的
His reforming zeal was boundless.
他对于改革热情无限。
Derricks are scattered here and there on the boundless plain.
在一望无际的原野上散布着一座座井架.
The work demanded boundless energy and theatrical imagination.
这种工作需要具备无限的精力和夸张的想象力。