Gravitacheometer
重力測速儀; 重力速測儀
??? 情景例句
Come on, Robbie.
走吧 Robbie。
I told him to stay till he calls.
我告訴他留下來等他打電話來。
After he had put it on the floor, he promptly went to sleep again.
他把床墊往地板上一放，很快又睡著了。