seronine

例句：

1. 1. The bird's melodious song is a delight to the ear.
   这只鸟悦耳的歌声令人愉悦。
2. 2. The canary was singing its favorite tune in the morning.
   那只金丝雀在早上唱着它最喜欢的曲子。
3. 3.Sisal is a strong and durable material that is often used for ropes and mats.
   西萨是种强韧耐用的材料，常用于绳索和垫子。