划清四个界限
delimit the four boundaries
五四四大副刊
the four Supplements in the May 4(superscript th
四大一支持综合疗法
Si-Da-Yi-Zhichi treatment
不动产资本市场的四个方向
Four quadrants of the real estate capital markets
超高效液相色谱－电喷雾离子源－串联三重四极杆质谱
ultra performance liquid chromatography-electrospr
超高效液相色谱三重四极杆质谱
ultra performance liquid chromatography-tandem mass spectrometry
超高效液相色谱三重四极杆质谱法
uplc-ms-ms
Ultra performance liquid chromatography-tandem mas
ultra performance liquid chromatography tandem mas
超临界CO2+EtOH+CO+H2四元体系
Supercritical CO2+EtOH+CO+H2 quaternary system
大四学生
Seniors in key science and technology universities
第四大贸易国
the 4th-largest trading nation
都市化四大矛盾
Four urbanization contradictions