The brown blotches of the benevolent skin cancer the sun brings from its reflection on the tropic sea were on his cheeks 腮帮上有些褐斑，那是太阳在热带海面上反射的光线所引起的良性皮肤癌变。
It remains a major problem in tropical countries , where it spreads through human waste used to fertilize crops 在热带国家，这仍是一大问题，因为钩虫会随著用来为谷物施肥的人类排泄物传播疾病。
Laterite a hard crust that may form on the surface of the soil in tropical regions with alternating wet and dry seasons 红土：在热带地区，土壤表面由于干湿交替而行成的具有坚硬外壳的一种土壤。
A golden lioness and her cub bask in the warmth of a savanna sun in tanzania ' s serengeti national park 在坦桑尼亚的塞伦吉地国家公园里，一只金色的狮子和它的孩子正沐浴在热带大草原温暖的阳光中。
" and besides , " said the countess , " accustomed as he is to burning climates , possibly he does not feel the heat as we do . “也许是”伯爵夫人说， “他是在热带过惯了的，他可能不象我们这样怕热。 ”
For example , they were asked to picture themselves on a sandy beach along a tropical coast - - or in a museum with lots to see 例如，让他们描绘出在热带海岸的沙滩上，或是在让人目不暇接的博物馆中。
On windy occasions such as the approach of a tropical cyclone , air streams of high wind speed may emerge from mountain gaps 风吹越山脉在刮大风的时候，例如在热带气旋逼近时，高速气流会在山峡形成。
Diseases transmitted by mosquitoes , such as malaria and dengue fever , are very common in tropical and sub - tropical countries 蚊虫传染病疟疾和登革热是经蚊咬而传播的，在热带及亚热带地区非常流行。
Tests for the resistance to micro - organisms of natural or artificial cellulose textiles . exposure in a chamber with tropical atmosphere 天然或合成纤维素织物抗微生物侵蚀的试验.暴露在热带环境实验间内
Ascending corn may learn over time to cease to die off at the end of each harvest and renew itself , especially in tropical regions 提升玉米随时间可以学会每季收获后不再死亡而是再生，尤其是在热带地区。
