不定的

A gust of wind blew the flickering candle out.

一阵风把闪烁蜡烛吹熄了。

The heavy rain might settle the changeable weather.

这场大雨也许能使变幻天气稳下。

He has an incalculable disposition.

他有一种捉摸脾气。

Modal verbs generally take the bare infinitive.

情态动词通常用带to 式。

In dealing with that unpredictable man, you simply cannot follow a prearranged plan, you have to play it by ear.

和那个捉摸人打交道, 你简直无法按预计划事, 只好随机应变。

It's difficult to find a window cleaner who will call regularly—they all seem to be here today and gone tomorrow.

要找一个能期擦窗户人很难——他们似乎都是些踪人。

He accused me of being a tax-and-spend liberal, a Jimmy Carter clone, and a waffler who couldn't make up his mind.

他指责我是一个只知道增加税收和开支自由派，是第二个吉米.卡特，墙头草，一个举棋人。

Trees of the family Dipterocarpaceae dominate the canopy and emergent layers of the hyper-diverse, aseasonal, humid lowland tropical forests of Southeast Asia.

以龙脑香科植物为主东南亚热带雨林有一非常特别现象，那就是期大开花现象。