vt.在 ... 之前；先于
vi.在前面；领先
He precede his speech with a welcome to the guest. 他演讲前先对来宾表示欢迎。
The we should always precede the I. 集体总应先于个人。
This duty should precede all others. 此项义务应该优先于其他一切义务。
用作不及物动词 (vi.)The days that preceded were filled with activity. 前几天排满了活动。
Agricultural development simply must precede economic development. 农业的发展必须在整个经济发展中处于领先地位。
Careful experiments precede hard- ware development, and engineers use sensible metrics to judge their success. 仔细的实验领先于硬件的发展，工程师们用韵律学来鉴定他们的成功。
precede的基本意思是“在前”“先于”,指某物在顺序、位置或时间等方面处在前面。引申可作“优于”“高于”解。
precede可用作及物动词,也可用作不及物动词。用作及物动词时接名词或代词作宾语。
precede的主语是人时,后面常接介词by或with引出的短语。后接by时多用于被动结构; 后接with时一般用主动结构。
adj.空前的；前所未有的
n.优先；居先
