Ecologist Garrett Hardin described this idea in nineteen sixty-eight as "the tragedy of the commons."

經(jīng)濟 學家加勒特视色网、视色视频。哈丁在 1968 年稱這一觀念為"共有的悲劇"美女高潮潮喷流白浆视频在线观看。

But since the nineteen eighties, researchers have been concerned about the helve health of these valuable pollinators.

但是自從20世紀80年代以來久久久精品久久久，研究者擔心這些有價值的傳授花粉的健康国产亚洲人成网站在线观看4。

But since the nineteen eightie s , researchers have been concerned about the helve health of the se valuable pollinators.

但是自從20世紀80年代以來国产ktv内交换配乱婬视频，研究者擔心這些有價值的傳授花粉的健康性欧美XXXX18HD视频。

Did you buy your hi-fi in nineteen ninety-five.

你的組合音響是1995年買的嗎？

She told him that this extreme exaltation had been described as manifesting itself through nineteen physical symptoms, including the shedding of tears, a tremor of the body, horripilation, perspiration, and a burning sensation.

她告訴他這種極度的興奮已經(jīng)通過十九種身體癥狀顯現(xiàn)出來午夜5060国产一级A片，包括流淚日韩精品美女网页在线观看免费、身體顫動、雞皮疙瘩色在线综合、排汗干天天干，還有強烈的感情。

In nineteen thirteen, Hubble returned to the United States.

在1913年哈勃回到了美國三级视频网站欧美日韩。

On Inauguration Day in nineteen thirty-three, the nation waited to hear what the new president would say about the economic future of their country.

羅斯福啪啪啪精品。在1933年就職典禮上7160无码视频在线观看，整個國家都在等待著聽這位新總統(tǒng)將要發(fā)表的對他們國家未來經(jīng)濟的藍圖。

Discussed From the artistic angle, Nineteen Ancient Poems use unique language manifestation to achieved Gentleman social stratum unique In language inelegance, and use the diversification expressing ways to form a neat form.

從藝術世界的視角來論花蝴蝶高清视频在线观看01，《古詩十九首》通過語言的化用人人干人人操人人、疊字的運用形成了士階層特有的語言上的"雅"，通過多樣化的抒情手法干干干干干干射射、比興的運用形成了手法上的"工"日屄网站免费看。

I was in the Seventh Infantry until June nineteen-eighteen. I knew I'd seen you somewhere before.

我在十六連，直到一九八年六月91黄色视频在线观看，我剛才就知道我以前在哪兒見過您的色黄色视频在线免。

Thereinto, nineteen cold/warm climatic fluctuations correspond with stadial/interstadial of GRIP, the five substages are rather consistent with the Guliya ice core in the climatic fluctuating features and phase as well as the North Atlantic climate reflected by the N. pachydema numbers of V23-81 core.

其中，19次冷/暖波動可與格陵蘭GRIP冰心δ18O冰段/間冰段相對應亚洲三级片在线网址，5個亞段與我國古里雅冰心在波動性質(zhì)和相位上都極為一致超碰在线人妻露脸，與V23-81冷性浮游有孔蟲數(shù)代表的北大西洋地區(qū)氣候也具有較好的可比性。