求翻译：若职员需要临时出差但无经济舱可选乘，可在事先取得总经理、副总经理和财务总监的批准后选乘公务舱。是什么意思？

If employees need temporary duty, but no economy class served by the selected business-class travel, you can first obtain the approval of the president, vice president and chief financial officer.

If employees need to temporary travel economy class, you can choose to take, and can be made in advance, the manager and chief financial officer after approval by the Business Class.

But if the staff member needs the temporary business trip not to have the economy class cabin to be possible to elect to ride, after but is obtaining general manager, deputy general manager and the financial inspector general's authorization beforehand elects while the business-class.

If temporary duty staff but no economy can be selected by, made may, with the prior approval of the General Manager, Senior Vice President and Chief Financial Officer business class after the election.

正在翻译，请等待...