Just as there are occupations that require college degrees also there are occupations for which technical training is necessary.句中已经有谓语了，所以只能用动名词作主语。
举个例子:1.Unlike what some of us might imagine， the bombs didn't completely disintegrate everything without a trace.
position /pə'ziʃn/ n. 位置，职位，职务。predecessor /'pri:disesə/ n. 前任，原有的事物。premise /'premis/ n. 前提，假设。prescription /pri'skripʃn/ n. 处方。preservation /ˌprezə'veiʃn/ n. 保护，防护。prestige /pre'sti:ʒ/ n. 威信，威望。priority /prai'ɒrəti/ n. 优先。prospect /'prɒspekt/ n. 前景，可能性。
