Why could pendulum clocks show the hours more exactly than earlier clocks?
举一反三
- Very seldom that two clocks or watches exactly agree.
- Clocks in different part of the world show ______ at the same time.
- Very seldom that two clocks or watches exactly agree. A: you find B: find you C: you will find D: do you find
- ...the clocks may have an implied meaning of __.
- Where did the civilisation of making clocks begin?