The Aero L-29 "Dolphin" is a Czechoslovak training aircraft that made its first flight in April 5, 1959.
1959年4月5日，捷克斯洛伐克教练机l - 29海豚首飞。
This effort has included attempts to modify for unmanned flight the MiG-21 (ph) and with greater success an aircraft called the L-29 (ph).
这些无人飞行器中包括改进的无人飞行器米格-21和称之为L-29的飞机。
Wang L, Huang L L, Yang H Y, et al. Developing and testing of image identification system for Bactroceraspp[J]. Plant Quarantine, 2013(5):29-35.
汪露，黄丽莉，杨慧勇，等。果实蝇属昆虫图像识别系统的开发与测试[J]。植物检疫，2013（5）：29-35。
Galassi, Francesco L. Measuring Social Capital: Culture as an Explanation of Italy's Economic Dualism. European Review of Economic History 5 (April 2001): 29-59.
衡量社会资本：用文化说明义大利经济的二元性〉，《欧洲经济史回顾》第5期（2001年4月号）：第29-59页。
Galassi, Francesco L. Measuring Social Capital: Culture as an Explanation of Italy's Economic Dualism. European Review of Economic History 5 (April 2001): 29-59.
衡量社会资本：用文化说明义大利经济的二元性〉，《欧洲经济史回顾》第5期（2001年4月号）：第29-59页。
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