America’s lead is declining slightly, but remains huge at the top of the knowledge tree.

美国的领先地位虽然有些许下降，但在知识界他依然是首屈可指的。

youdao

Mixing the two types of nodes is highly discouraged, as it can lead to unpredictable results (for example, during validation of the tree).

混合使用这两种类型的节点很不妥，因为这样会导致无法预料的结果(例如，在验证树的时候)。

youdao

Since the user is not using a tree-based object model to access this part of the document, constructing the entire tree would lead to a waste of memory due to replication of data.

因为用户不使用基于树的对象模型来访问这部分文档，所以构造完整的树会因为数据重复而浪费内存。

youdao

The American food company Mars took the lead in paying for mapping the genes of the Forastero cocoa tree.

VOA: special.2010.10.19

Today we tell you about some new understanding of why cutting the main branch of a plant or tree can lead to better development.

VOA: special.2009.10.13

The disease causes leaf loss and crown dieback in affected trees, and it can lead to tree death.

BBC: Survey in forest

Max dragged the boat onto the beach, placed a group of large stones around it, and tied its lead to the biggest tree he could find.

NEWYORKER: Max at Sea

Concerned parents still need to find something to put under the tree amid the lead fears.

FORBES: Toy Scare Could Help Wal-Mart