1.
" Rubber, vulcanized--Determination of flex cracking"
GB/T13934-1992硫化橡胶屈挠龟裂的测定
2.
flex cracking test
（涂层的）耐屈挠龟裂强度试验,挠曲疲劳试验
3.
2,2'-methylene-bis(4-methyl-6-tert -butylphenol)
一特丁基间甲酚[抗曲挠龟裂剂]
4.
A tumblebug came next, heaving sturdily at its ball,
不久，又有一只金龟子飞过来，不屈不挠地在搬一个粪球；
5.
bear up under affliction
忍受苦难, 不屈不挠
6.
the unbreakable spirit of the resistance
不屈不挠的抵抗精神.
7.
He is endowed with indomitable will.
他有不屈不挠的意志。
8.
cold crack temperature
低温龟裂温度,冷裂温度
9.
The soil is cracking up because of the drought.
土地因干旱而正在龟裂。
10.
crossbreaking strength
横断裂强度, 挠曲强度
11.
Unyielding in purpose, principle, or temper;immovable.
不屈挠的，不退让的在目标、原则或个性上不屈挠的；坚定不可动摇的
12.
The turtle at last gives up by pulling his feet under his shell,
海龟终于屈服了，将4条腿缩进壳内。
13.
She was a woman of great resolve.
她是一个不屈不挠的女人。
14.
The relief workers kept soldiering on.
救援人员不屈不挠地继续工作。
15.
He carried off the palm by sheer perseverance.
他全靠不屈不挠的精神获得胜利。
16.
They kept up the form of running with undiminished courage.
他们不屈不挠，始终保持着跑的姿势。
17.
Vegetation invariably struggles towards the light.
植物不屈不挠地为争得阳光竟相斗争。
18.
So would I, unbroken,
但愿我也能如此，不屈不挠，