A technologist is a specialist in technology， while a technician is an expert in techniques of a particular art， etc.
500 outside [ˈautˈsaid] prep./ n./ ad./ a.(在，向)的外面(的)501 piece [pi:s] n.片，块，段，件；断片，碎块 vt.拼合(凑)502 sometimes [ˈsʌmtaimz] ad.
在英语学习过程中，词汇量的累积，是培养语言技能的基础。The need to communicate is a key characteristic of human society.生物是我最喜欢的学科。
