49 According to the passage, which of the following is NOT true about grasshoppers?
(A)They can be easily seen on the radar system.
(B)They often migrate to Arizona.
(C)They like torrential downpouring.
(D)The swarms of grasshoppers are a common scene in Arizona.

(無販售)
A wet spring in Las Vegas has spawned hordes of grasshoppers so large that they are showing up on the weather radar.
拉斯維加斯的一個潮濕的春天催生了成群的蚱蜢，它們體型很大，以至於它們出現在天氣雷達上。 
In viewing the radar, CNN meteorologist Allison Chinchar said it looked like there were two storms over the Vegas area: one in the north of the city (that was actual rain) and another right over Las Vegas.
在查看雷達時，CNN 氣象學家 Allison Chinchar 說，看起來拉斯維加斯地區有兩場風暴：

一場在城市北部（那是實際的降雨），另一場在拉斯維加斯上空。

But the second one wasn’t moving as rain normally would, she said. “
但她說，第二個並沒有像往常一樣下雨。，
It looked as though it should be torrentially downpouring in Las Vegas,” said Chinchar.
 “看起來拉斯維加斯應該是傾盆大雨”

By changing the settings on the radar, meteorologists could see that the other “storm” was actually the massive hordes of grasshoppers that have settled over the city in recent days, Chinchar said.
 透過改變雷達上的設置，氣象學家可以看到，另一場“風暴”實際上是最近幾天在這座城市上空定居的大群蚱蜢。

Las Vegas, like all of Nevada, has had almost twice as much rain in 2019 than normal, Chinchar said. “
拉斯維加斯，與內華達州一樣，2019 年的降雨量幾乎是正常情況的兩倍。

It appears through history that when we have a wet winter or spring, these things build up often down below Laughlin and even into Arizona,” Jeff Knight, state entomologist, said.
 從歷史上看，當我們有一個潮濕的冬天或春天時，這些東西通常會在勞克林下方甚至亞利桑那州堆積，

“We’ll have grasshopper migrations about this time of the year, and they’ll move northward.
每年的這個時候我們都會有蚱蜢遷徙，它們會向北移動。

” Knight said the swarms aren’t terribly unusual given the amount of rain the state has had this year.
考慮到該州今年的降雨量，這些蜂群並不罕見。

“We have records clear from the ’60s of it happening, and I have seen it ... at least four or five times in my 30-plus years,” he said.
 從 60 年代起，我們就有清楚的記錄，而且我已經看到了……在我 30 多年的時間裡，至少有四五次

“There are some special weather conditions that trigger the migration.”
有一些特殊的天氣條件會觸發遷移。