鸟 diǎo 有 yǒu 敏锐 mǐnruì 的 de 视力 shìlì ,而 ér 狗 gǒu 有 yǒu 灵敏 língmǐn 的 de 嗅觉 xiùjué .

Birds have sharp eyes and dogs have sharp noses.

现在 xiànzài ,虽然 suīrán 饿 è 的 de 痛苦 tòngkǔ 已经 yǐjīng 不再 bù zài 那么 nà me 敏锐 mǐnruì , 他 tā 却 què 感到 gǎn dào 了 le 虚弱 xū ruò .

Though the hunger pangs were no longer so exquisite , he realized that he was weak.

尽管 jǐnguǎn 瓶子 píngzi 呈现 chéngxiàn 嫩 nèn 绿色 lǜ sè , 但 dàn 观察力 guān chá lì 敏锐 mǐnruì 的 de 客人 kèrén 不久 bù jiǔ 会 huì 注意 zhùyì 到 dào ,瓶子里装 zhuāng 的 de 看上去 kàn shang qu 像 xiàng 是 shì 浓厚 nónghòu 的 de 灰色 huī sè 物质 wùzhì .

Despite the fact that the bottle is tinted a delicate shade of green, an observant visitor would soon notice that it is filled with what looks like a

小于 xiǎo yú 90度 dù 的 de 角 Jué 叫 jiào 锐角 ruì jiǎo .

Angles of less than 90 degrees are called acute angles.