Protosternum
第一胸板
🗣️ 情景例句
The bad news is, you won't be able to adopt the dog.
坏消息是你不能收养那只狗了。
False friends are worse than open enemies.
明枪易躲，暗箭难防。
It is the one world in the Solar System that is most like the Earth.
火星是太阳系里与地球最接近的一颗行星。