Secretary of defense
The United States secretary of defense (SecDef) is the head of the United States Department of Defense, the executive department of the U.S. Armed Forces, and is a high ranking member of the federal cabinet. The secretary of defense's position of command and authority over the military is second only to that of the president of the United States, who is the commander-in-chief. This position corresponds to what is generally known as a defense minister in many other countries. The secretary of defense is appointed by the president with the advice and consent of the Senate, and is by custom a member of the Cabinet and by law a member of the National Security Council.
国防部长
美国国防部长（SecDef）是美国国防部的首脑，是美国武装部队的执行部门，是联邦内阁的高级成员。 国防部长的指挥权和对军队的权力仅次于美国总统，后者是总司令。 这个职位相当于许多其他国家通常所说的国防部长。 国防部长由总统在参议院的建议和同意下任命，按照惯例是内阁成员，根据法律是国家安全委员会成员。
