One type of external evidence that may shed light on the transmission of Roman texts is the availability of a work in the Middle Ages, when many classical texts were circulated.
当许多经典文本都在流传时，一种可能有助于罗马文本传播的外部证据是中世纪的一部作品。
The system is heavily reliant on the availability of sunlight, and for critical tasks or areas a back-up artificial light source is required.
此系统对阳光有很强的依赖性，对于一些极端的工程或地区，需备有备用人工光源。
Then the improvement measures of traffic safety have been advanced in the light of evaluation result and the availability of the improvement measures has been showed based on VISSIM.
随后，根据评价结果，提出了相应的交通安全改善措施，并应用VISSIM仿真软件验证了两种改善方案的有效性。
The table-top has the advantages of light weight, high intensity, beautiful appearance and low price, the stone availability ratio is raised, and the natural resources are saved.
这种台面具有重量轻、强度高、外形美观、价格低的优点，而且可提高石材利用率，节约自然资源。
Power output is constrained by the availability of light falling on the cell, though significant output is still possible with overcast skies.
虽然在阴天仍然可能输出主要的能量，但其能量的输出是受制于电池上所能获取的光照。v9 C ！
Features: All weather condition operation availability, sound, light and transmission alarming.
特点：全天候工作，具有声、光报警功能。
The utility model has the advantages of high strength, light weight, good windproof ability, composite type mounting, dismantlement availability, easy assembly, and convenient carrying.
具有强度高、重量轻、防风能力强的效果，组合式安装，可拆卸，安装简单、携带方便。
The utility model has the advantages of high strength, light weight, good windproof ability, composite type mounting, dismantlement availability, easy assembly, and convenient carrying.
具有强度高、重量轻、防风能力强的效果，组合式安装，可拆卸，安装简单、携带方便。
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