Sphaeridium
球棘(海膽)
??? 情景例句
I've invited you here for the weekend to help celebrate.
我邀請你們到這兒來渡周末， 一起慶祝。
She was promoted on the basis of her accomplishment.
她是依其成就得到晉升的。
So when it's spring in China, it is autumn in Australia.
因此，當中國是春天的時候，澳大利亞則是秋天。