495. The academic topic is why the blade of the spade is still sharp after decades' decay.

学术话题是为什么萎缩透明妥帖铁锨刃口经过几十年的腐烂之后仍然锋利。

494. After a shot the foot began to root and shoot in the boot.

打了一针后，脚开始在靴子里生根发芽。

493. Thanks to the bankrupt banker, my ankle avoided an injury.

多亏那位破产的银行家，我的脚踝免受伤害。

492. The frank man put the first-rank blank blanket into the tan tank.

直率的男子将一流空白毛毯放进黝黑的大容器

491. The sailor was nailed on the rail for he failed to trail the mail.

水手被钉在横木上，因为他未能跟踪邮件。

490. Details about the tailor' s tail are available from the prevailing dailies.

有关我缝在尾巴的细节可从流行的日报上得到。

489. From the experiment the experienced expert gained an unexpected expertise.

有经验的专家从实验中获得一项意外技能。

488. The patriot' s radar made the radical patient impatient.

爱国者的雷达使激进病人不耐烦。

487. The one-eyed man obeyed the obedient audience' s order.

独眼人服从了顺从的听众的命令。

486. The empty empire' s emperor made an attempt to tempt the contemptuous man.

空虚帝国的皇帝试图诱惑那个轻蔑的人。