就隧道施工机械的超前磨损原因进行了分析，并寻找了补救途径。
The reasons of advanced wear for these machineries are analyzed and remedial ways are sought out.
APRT编码基因在体细胞胚发育过程中的活跃表达，意味着在高等植物胚胎发生或发育过程中存在核苷酸补救合成途径。
APRT coding gene was active during the development of somatic embryogenesis, this indicated a way of nucleotide remedial synthesis existed during embryogenesis or embryo development in higher plant.
APRT编码基因在体细胞胚发育过程中的活跃表达，意味着在高等植物胚胎发生或发育过程中存在核苷酸补救合成途径。
APRT coding gene was active during the development of somatic embryogenesis, this indicated a way of nucleotide remedial synthesis existed during embryogenesis or embryo development in higher plant.
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