你得知道站在哪里观察角度比较理想。You have to know where to stand for a good viewpoint.养育孩子的现实经常与浪漫的理想大相径庭。The reality of mothering is frequently very different from the romantic ideal.城市公园是理想去处，那里几乎一年四季鲜花盛开。Town gardens are ideal becaus...
Optionally, the purified diisobutylene may be hydrogenated to isooctane hydrogenation catalyst.任选的是, 可用加氢催化剂将纯化的二聚异丁烯加氢生成异辛烷.The process comprises first oligomerizing isobutylene to diisobutylene using a sulfonic acid ty...
A brief review of chloroplast structure is useful before discussing these experiments.在讨论这些试验以前,对叶绿体结构作一简短的概述是有益的.The chloroplast envelope has the light yellow color of violaxanthin.叶绿体的套膜有紫黄质的淡黄色.Chloroplast ribosomes c...