Surface defect and macrostructure of high carbon steel billet were analyzed.介绍了铸坯相关表面缺陷及低倍组织,提出了质量控制措施及方案.Macroproposition: It is the general proposition used to form an overall macrostructure of the story.宏观命题: 它是用来形成故事...
许多校舍不安全，有些简直是摇摇欲坠。Many school buildings are unsafe, and some are falling apart.由于存在着危险的下层逆流，在大部分海岸线附近游泳都不安全。Dangerous undertows make swimming unsafe along most of the coastline.男女混合的舞池不安全，对女孩子尤其如此。A mixed-sex moshpit is ...
这是无氧时所得能量的19倍.This is 19 times the energy obtainable under anaerobic circumstances.光谱测量用的乳胶应贮存在干燥 、 无氧的环境中.Spectroscopic emulsion should be stored in a dry, oxygen - free environment.地方的情况(特别是有氧或无氧)影响着生物降解.Local conditio...