人口稠密区

AOPA表示，并非所有人都需考证才能操控无人机。操控7公斤以下无人机，在室内或非人口稠密区操控无人机，则不必考证。

Not everyone needs a certificate to fly a drone ; if a drone weighs less than 7 kg , if it is flown indoors or in sparsely populated areas , then a certificate is not required , the AOPA says .

ph.1.人口稠密区一个很大的人口密度高的城市区域；有可能包含几个相互独立的行政区划。

A large and densely populated urban area ; may include several independent administrative districts .

人口稠密区土壤氮密度空间分布估算及不确定性评价

Estimation and Uncertainty Assessment of Spatial Distribution of Soil Nitrogen Density in Densely Populated Rural

房租和生活服务价格普遍在上涨，非凡是在人口稠密区更是如此。

Chummage and life service price are rising generally , be in especially populous area is more such .

城市地铁隧道往往修建于人口稠密区，且周边建筑物、地下管线复杂、隧道线路相互交错、距离近，这给爆破施工增加了很大困难。

The urban subway tunnel is always built in thickly populated area with many surrounding this case , it is difficult for excavation by blasting .

导弹是瞄准军事目标而不是瞄准城市人口稠密居住区的。

The missiles are aimed at military targets , not at urban centres .

在人口稠密的居住区噪音污染尤为厉害。

Noise pollution is at its worst in densely populated areas .

它既是重要的工业区，同时也是人口稠密的居住区。

Brooklyn is both an important industrial center and a densely populated residential area .