Under her contract of employment, Mrs Lee could not be required to work at a different site.根据李女士的雇佣合同，雇主不能要求她到另一地工作。I have not yet signed a contract of employment.我还没有签雇佣合同。You should make sure that you have a formal contract of employment.你应确保自己有一份正式的雇佣合同。These conditions must be expressly incorporated into the contract of employment.这些条件必须明确地写进雇佣合同当中。