a windless day.
无风得一天。

windless drying box.
无风干燥箱

The whole windless place smelt sour and ammoniac.
没有一丝风，整个这块地方弥漫着酸臭和阿摩尼亚味道。

They are only effective when used under windless conditions.
他们是唯一有效的使用时，在无风的条件。

In order to better windless, boatman let the three boats together.
为了更稳定，船夫将三条船系在了一起。

Windless weather and favorable tides were required for the landing operations.
无风的天气和有利的潮汐是登陆行动所必须的。

Simulation Assessment of Hazardous Consequence of Poisonous Material Diffused into Atmosphere under Instantaneous Leakage and Windless Condition
有毒化学物质瞬时泄漏无风大气扩散的危害后果模拟分析

Another climatic characteristic is cold winter with large daily temperature difference, favoring thermal inversion especially in clear and windless days.
气候因素得另一特点是冬季寒冷，日温差较大。