1.
It is strong, light and cheap.
它坚韧、轻便、便宜；
2.
To make or become tough.
使坚强使或变得坚强、强硬、强壮、坚韧
3.
This experience will toughen her.
这次经历会让他变坚韧。
4.
This material is as tough as leather.
这料子像皮革般坚韧。
5.
of a consistency requiring chewing.
指需要咀嚼的坚韧性。
6.
a tough all-weather faBric.
一种坚韧的全天候织物
7.
Every 2-tough graph is fractionally Hamiltonian
2-坚韧图是分数Hamiltonian
8.
strong woody fibers obtained especially from the phloem of from various plants.
尤指来自植物韧皮的坚韧的木质纤维。
9.
Made of or as flexible as withes; tough.
柳条般柔韧的柳条作的，柳条般灵活的；坚韧的
10.
Pesistent people begin their success where others end in failure.
坚韧的人从别人的失败中迈向成功。
11.
strong lightweight wood of the balsa tree used especially for floats.
轻而坚韧的轻木木料，用于制筏。
12.
an evergreen shrub with leathery leaves.
有坚韧叶子的常绿的灌木。
13.
gymnosperms with simple persistent needlelike or scalelike leaves.
裸子植物带有细小坚韧针状或鳞状叶。
14.
large tough non-rigid bag filled with gas or hot air.
充满气体或热空气的坚韧的大袋子。
15.
tough meat that needs stewing to be edible.
坚韧的肉，需要炖过才能吃。
16.
He played the man in the time of great troubles.
他在极为困难的时候坚韧不拔。
17.
strong stiff wood of a black-locust tree; very resistant to decay.
坚韧的黑洋槐木料，抗腐蚀性极强。
18.
Success only belong to the team with correct goal and persistence.
成功只属于目标正确，坚韧不拔的团队。